diff --git a/index.js b/index.js
index 9024587..a0240e2 100644
--- a/index.js
+++ b/index.js
@@ -6,6 +6,7 @@ module.exports.setup = require('./services/setup');
 module.exports.put = db.put;
 module.exports.get = db.get;
 module.exports.del = db.del;
+module.exports.applyLock = db.applyLock;
 module.exports.batch = db.batch;
 module.exports.putMeta = db.putMeta;
 module.exports.patchMeta = db.patchMeta;
diff --git a/package-lock.json b/package-lock.json
index 43a9408..8013d40 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -31,15 +31,15 @@
       "dev": true
     },
     "acorn": {
-      "version": "6.0.4",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.0.4.tgz",
-      "integrity": "sha512-VY4i5EKSKkofY2I+6QLTbTTN/UvEQPCo6eiwzzSaSWfpaDhOmStMCMod6wmuPciNq+XS0faCglFu2lHZpdHUtg==",
+      "version": "6.1.1",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.1.1.tgz",
+      "integrity": "sha512-jPTiwtOxaHNaAPg/dmrJ/beuzLRnXtB0kQPQ8JpotKJgTB6rX6c8mlf315941pyjBSaPg8NHXS9fhP4u17DpGA==",
       "dev": true
     },
     "acorn-globals": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/acorn-globals/-/acorn-globals-4.3.0.tgz",
-      "integrity": "sha512-hMtHj3s5RnuhvHPowpBYvJVj3rAar82JiDQHvGs1zO0l10ocX/xEdBShNHTJaboucJUsScghp74pH3s7EnHHQw==",
+      "version": "4.3.2",
+      "resolved": "https://registry.npmjs.org/acorn-globals/-/acorn-globals-4.3.2.tgz",
+      "integrity": "sha512-BbzvZhVtZP+Bs1J1HcwrQe8ycfO0wStkSGxuul3He3GkHOIZ6eTqOkPuw9IP1X3+IkOo4wiJmwkobzXYz4wewQ==",
       "dev": true,
       "requires": {
         "acorn": "^6.0.1",
@@ -59,9 +59,9 @@
       "dev": true
     },
     "ajv": {
-      "version": "6.6.1",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.6.1.tgz",
-      "integrity": "sha512-ZoJjft5B+EJBjUyu9C9Hc0OZyPZSSlOF+plzouTrg6UlA8f+e/n8NIgBFG/9tppJtpPWfthHakK7juJdNDODww==",
+      "version": "6.10.0",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.0.tgz",
+      "integrity": "sha512-nffhOpkymDECQyR0mnsUtoCE8RlX38G0rYP+wgLWFyZuUyuuojSSvi/+euOiQBIn63whYwYVIIH1TvE3tu4OEg==",
       "dev": true,
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@@ -82,16 +82,15 @@
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-      "resolved": "http://registry.npmjs.org/ansi-escapes/-/ansi-escapes-3.1.0.tgz",
-      "integrity": "sha512-UgAb8H9D41AQnu/PbWlCofQVcnV4Gs2bBJi9eZPxfU/hgglFh3SMDMENRIqdr7H6XFnXdoknctFByVsCOotTVw==",
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-3.2.0.tgz",
+      "integrity": "sha512-cBhpre4ma+U0T1oM5fXg7Dy1Jw7zzwv7lt/GoCpr+hDQJoYnKVPLL4dCvSEFMmQurOQvSrwT7SL/DAlhBI97RQ==",
       "dev": true
     },
     "ansi-regex": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
-      "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
-      "dev": true
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
+      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8="
     },
     "ansi-styles": {
       "version": "3.2.1",
@@ -150,7 +149,7 @@
     },
     "array-equal": {
       "version": "1.0.0",
-      "resolved": "http://registry.npmjs.org/array-equal/-/array-equal-1.0.0.tgz",
+      "resolved": "https://registry.npmjs.org/array-equal/-/array-equal-1.0.0.tgz",
       "integrity": "sha1-jCpe8kcv2ep0KwTHenUJO6J1fJM=",
       "dev": true
     },
@@ -197,12 +196,12 @@
       "dev": true
     },
     "async": {
-      "version": "2.6.1",
-      "resolved": "https://registry.npmjs.org/async/-/async-2.6.1.tgz",
-      "integrity": "sha512-fNEiL2+AZt6AlAw/29Cr0UDe4sRAHCpEHh54WMz+Bb7QfNcFw4h3loofyJpLeQs4Yx7yuqu/2dLgM5hKOs6HlQ==",
+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.2.tgz",
+      "integrity": "sha512-H1qVYh1MYhEEFLsP97cVKqCGo7KfCyTt6uEWqsTBr9SO84oK9Uwbyd/yCW+6rKJLHksBNUVWZDAjfS+Ccx0Bbg==",
       "dev": true,
       "requires": {
-        "lodash": "^4.17.10"
+        "lodash": "^4.17.11"
       }
     },
     "async-limiter": {
@@ -245,12 +244,6 @@
         "js-tokens": "^3.0.2"
       },
       "dependencies": {
-        "ansi-regex": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
-          "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
-          "dev": true
-        },
         "ansi-styles": {
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           "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz",
@@ -259,7 +252,7 @@
         },
         "chalk": {
           "version": "1.1.3",
-          "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
           "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
           "dev": true,
           "requires": {
@@ -276,15 +269,6 @@
           "integrity": "sha1-mGbfOVECEw449/mWvOtlRDIJwls=",
           "dev": true
         },
-        "strip-ansi": {
-          "version": "3.0.1",
-          "resolved": "http://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
-          "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
-          "dev": true,
-          "requires": {
-            "ansi-regex": "^2.0.0"
-          }
-        },
         "supports-color": {
           "version": "2.0.0",
           "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
@@ -328,6 +312,12 @@
           "requires": {
             "ms": "2.0.0"
           }
+        },
+        "ms": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+          "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
+          "dev": true
         }
       }
     },
@@ -378,7 +368,7 @@
     },
     "babel-plugin-istanbul": {
       "version": "4.1.6",
-      "resolved": "http://registry.npmjs.org/babel-plugin-istanbul/-/babel-plugin-istanbul-4.1.6.tgz",
+      "resolved": "https://registry.npmjs.org/babel-plugin-istanbul/-/babel-plugin-istanbul-4.1.6.tgz",
       "integrity": "sha512-PWP9FQ1AhZhS01T/4qLSKoHGY/xvkZdVBGlKM/HuxxS3+sC66HhTNR7+MpbO/so/cz/wY94MeSWJuP1hXIPfwQ==",
       "dev": true,
       "requires": {
@@ -386,6 +376,17 @@
         "find-up": "^2.1.0",
         "istanbul-lib-instrument": "^1.10.1",
         "test-exclude": "^4.2.1"
+      },
+      "dependencies": {
+        "find-up": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/find-up/-/find-up-2.1.0.tgz",
+          "integrity": "sha1-RdG35QbHF93UgndaK3eSCjwMV6c=",
+          "dev": true,
+          "requires": {
+            "locate-path": "^2.0.0"
+          }
+        }
       }
     },
     "babel-plugin-jest-hoist": {
@@ -396,7 +397,7 @@
     },
     "babel-plugin-syntax-object-rest-spread": {
       "version": "6.13.0",
-      "resolved": "http://registry.npmjs.org/babel-plugin-syntax-object-rest-spread/-/babel-plugin-syntax-object-rest-spread-6.13.0.tgz",
+      "resolved": "https://registry.npmjs.org/babel-plugin-syntax-object-rest-spread/-/babel-plugin-syntax-object-rest-spread-6.13.0.tgz",
       "integrity": "sha1-/WU28rzhODb/o6VFjEkDpZe7O/U=",
       "dev": true
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@@ -478,6 +479,12 @@
           "resolved": "https://registry.npmjs.org/globals/-/globals-9.18.0.tgz",
           "integrity": "sha512-S0nG3CLEQiY/ILxqtztTWH/3iRRdyBLw6KMDxnKMchrtbj2OFmehVh0WUCfW3DUrIgx/qFrJPICrq4Z4sTR9UQ==",
           "dev": true
+        },
+        "ms": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+          "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
+          "dev": true
         }
       }
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@@ -564,9 +571,9 @@
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-      "version": "3.5.3",
-      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.3.tgz",
-      "integrity": "sha512-/qKPUQlaW1OyR51WeCPBvRnAlnZFUJkCSG5HzGnuIqhgyJtF+T94lFnn33eiazjRm2LAHVy2guNnaq48X9SJuw=="
+      "version": "3.5.5",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.5.tgz",
+      "integrity": "sha512-5am6HnnfN+urzt4yfg7IgTbotDjIT/u8AJpEt0sIU9FtXfVeezXAPKswrG+xKUCOYAINpSdgZVDU6QFh+cuH3w=="
     },
     "brace-expansion": {
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@@ -621,7 +628,7 @@
       "dependencies": {
         "resolve": {
           "version": "1.1.7",
-          "resolved": "http://registry.npmjs.org/resolve/-/resolve-1.1.7.tgz",
+          "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.1.7.tgz",
           "integrity": "sha1-IDEU2CrSxe2ejgQRs5ModeiJ6Xs=",
           "dev": true
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@@ -644,14 +651,9 @@
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     "buffer-writer": {
       "version": "1.0.1",
-      "resolved": "http://registry.npmjs.org/buffer-writer/-/buffer-writer-1.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/buffer-writer/-/buffer-writer-1.0.1.tgz",
       "integrity": "sha1-Iqk2kB4wKa/NdUfrRIfOtpejvwg="
     },
-    "builtin-modules": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/builtin-modules/-/builtin-modules-1.1.1.tgz",
-      "integrity": "sha1-Jw8HbFpywC9bZaR9+Uxf46J4iS8="
-    },
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       "resolved": "https://registry.npmjs.org/cache-base/-/cache-base-1.0.1.tgz",
@@ -668,26 +670,16 @@
         "unset-value": "^1.0.0"
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-      "version": "0.1.0",
-      "resolved": "https://registry.npmjs.org/caller-path/-/caller-path-0.1.0.tgz",
-      "integrity": "sha1-lAhe9jWB7NPaqSREqP6U6CV3dR8=",
-      "dev": true,
-      "requires": {
-        "callsites": "^0.2.0"
-      }
-    },
     "callsites": {
-      "version": "0.2.0",
-      "resolved": "http://registry.npmjs.org/callsites/-/callsites-0.2.0.tgz",
-      "integrity": "sha1-r6uWJikQp/M8GaV3WCXGnzTjUMo=",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/callsites/-/callsites-3.1.0.tgz",
+      "integrity": "sha512-P8BjAsXvZS+VIDUI11hHCQEv74YT67YUi5JJFNWIqL235sBmjX4+qx9Muvls5ivyNENctx46xQLQ3aTuE7ssaQ==",
       "dev": true
     },
     "camelcase": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
-      "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0=",
-      "dev": true
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-3.0.0.tgz",
+      "integrity": "sha1-MvxLn82vhF/N9+c7uXysImHwqwo="
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@@ -705,9 +697,9 @@
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-      "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.1.tgz",
-      "integrity": "sha512-ObN6h1v2fTJSmUXoS3nMQ92LbDK9be4TV+6G+omQlGJFdcUX5heKi1LZ1YnRMIgwTLEj3E24bT6tYni50rlCfQ==",
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+      "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
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         "ansi-styles": "^3.2.1",
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@@ -726,12 +718,6 @@
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       "dev": true
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-    "circular-json": {
-      "version": "0.3.3",
-      "resolved": "https://registry.npmjs.org/circular-json/-/circular-json-0.3.3.tgz",
-      "integrity": "sha512-UZK3NBx2Mca+b5LsG7bY183pHWt5Y1xts4P3Pz7ENTwGVnJOUWbRb3ocjvX7hx9tq/yTAdclXm9sZ38gNuem4A==",
-      "dev": true
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@@ -788,13 +774,12 @@
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-      "resolved": "https://registry.npmjs.org/cliui/-/cliui-4.1.0.tgz",
-      "integrity": "sha512-4FG+RSG9DL7uEwRUZXZn3SS34DiDPfzP0VOiEwtUWlE+AR2EIg+hSyvrIgUUfhdgR/UkAeW2QHgeP+hWrXs7jQ==",
-      "dev": true,
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/cliui/-/cliui-3.2.0.tgz",
+      "integrity": "sha1-EgYBU3qRbSmUD5NNo7SNWFo5IT0=",
       "requires": {
-        "string-width": "^2.1.1",
-        "strip-ansi": "^4.0.0",
+        "string-width": "^1.0.1",
+        "strip-ansi": "^3.0.1",
         "wrap-ansi": "^2.0.0"
       }
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@@ -837,23 +822,23 @@
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-      "version": "1.0.7",
-      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.7.tgz",
-      "integrity": "sha512-brWl9y6vOB1xYPZcpZde3N9zDByXTosAeMDo4p1wzo6UMOX4vumB+TP1RZ76sfE6Md68Q0NJSrE/gbezd4Ul+w==",
+      "version": "1.0.8",
+      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
+      "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
       "dev": true,
       "requires": {
         "delayed-stream": "~1.0.0"
       }
     },
     "commander": {
-      "version": "2.19.0",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-2.19.0.tgz",
-      "integrity": "sha512-6tvAOO+D6OENvRAh524Dh9jcfKTYDQAqvqezbCW82xj5X0pSrcpxtvRKHLG0yBY6SD7PSDrJaj+0AiOcKVd1Xg=="
+      "version": "2.20.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.0.tgz",
+      "integrity": "sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ=="
     },
     "component-emitter": {
-      "version": "1.2.1",
-      "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.2.1.tgz",
-      "integrity": "sha1-E3kY1teCg/ffemt8WmPhQOaUJeY="
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.0.tgz",
+      "integrity": "sha512-Rd3se6QB+sO1TwqZjscQrurpEPIfO0/yYnSin6Q/rD3mOutHvUrCAhJub3r90uNb+SESBuE0QYoB90YdfatsRg=="
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@@ -875,9 +860,9 @@
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-      "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.6.0.tgz",
-      "integrity": "sha512-kLRC6ncVpuEW/1kwrOXYX6KQASCVtrh1gQr/UiaVgFlf9WE5Vp+lNe5+h3LuMr5PAucWnnEXwH0nQHRH/gpGtw=="
+      "version": "2.6.9",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.6.9.tgz",
+      "integrity": "sha512-HOpZf6eXmnl7la+cUdMnLvUxKNqLUzJvgIziQ0DiF3JwSImNphIqdGqzj6hIKyX04MmV0poclQ7+wjWvxQyR2A=="
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     "core-util-is": {
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@@ -885,9 +870,9 @@
       "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
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-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/coveralls/-/coveralls-3.0.2.tgz",
-      "integrity": "sha512-Tv0LKe/MkBOilH2v7WBiTBdudg2ChfGbdXafc/s330djpF3zKOmuehTeRwjXWc7pzfj9FrDUTA7tEx6Div8NFw==",
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/coveralls/-/coveralls-3.0.4.tgz",
+      "integrity": "sha512-eyqUWA/7RT0JagiL0tThVhjbIjoiEUyWCjtUJoOPcWoeofP5WK/jb2OJYoBFrR6DvplR+AxOyuBqk4JHkk5ykA==",
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@@ -895,7 +880,7 @@
         "lcov-parse": "^0.0.10",
         "log-driver": "^1.2.7",
         "minimist": "^1.2.0",
-        "request": "^2.85.0"
+        "request": "^2.86.0"
       }
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     "cross-spawn": {
@@ -912,23 +897,23 @@
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-          "resolved": "https://registry.npmjs.org/semver/-/semver-5.6.0.tgz",
-          "integrity": "sha512-RS9R6R35NYgQn++fkDWaOmqGoj4Ek9gGs+DPxNUZKuwE183xjJroKvyo1IzVFeXvUrvmALy6FWD5xrdJT25gMg==",
+          "version": "5.7.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.0.tgz",
+          "integrity": "sha512-Ya52jSX2u7QKghxeoFGpLwCtGlt7j0oY9DYb5apt9nPlJ42ID+ulTXESnt/qAQcoSERyZ5sl3LDIOw0nAn/5DA==",
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-      "resolved": "https://registry.npmjs.org/cssom/-/cssom-0.3.4.tgz",
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+      "version": "0.3.6",
+      "resolved": "https://registry.npmjs.org/cssom/-/cssom-0.3.6.tgz",
+      "integrity": "sha512-DtUeseGk9/GBW0hl0vVPpU22iHL6YB5BUX7ml1hB+GMpo0NX5G4voX3kdWiMSEguFtcW3Vh3djqNF4aIe6ne0A==",
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       "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
       "requires": {
         "safe-buffer": "~5.1.0"
       }
     },
     "strip-ansi": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
-      "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
-      "dev": true,
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+      "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
       "requires": {
-        "ansi-regex": "^3.0.0"
+        "ansi-regex": "^2.0.0"
       }
     },
     "strip-bom": {
@@ -6098,7 +6280,7 @@
     },
     "strip-eof": {
       "version": "1.0.0",
-      "resolved": "http://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz",
+      "resolved": "https://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz",
       "integrity": "sha1-u0P/VZim6wXYm1n80SnJgzE2Br8=",
       "dev": true
     },
@@ -6123,21 +6305,55 @@
       "dev": true
     },
     "table": {
-      "version": "5.1.1",
-      "resolved": "https://registry.npmjs.org/table/-/table-5.1.1.tgz",
-      "integrity": "sha512-NUjapYb/qd4PeFW03HnAuOJ7OMcBkJlqeClWxeNlQ0lXGSb52oZXGzkO0/I0ARegQ2eUT1g2VDJH0eUxDRcHmw==",
+      "version": "5.4.0",
+      "resolved": "https://registry.npmjs.org/table/-/table-5.4.0.tgz",
+      "integrity": "sha512-nHFDrxmbrkU7JAFKqKbDJXfzrX2UBsWmrieXFTGxiI5e4ncg3VqsZeI4EzNmX0ncp4XNGVeoxIWJXfCIXwrsvw==",
       "dev": true,
       "requires": {
-        "ajv": "^6.6.1",
+        "ajv": "^6.9.1",
         "lodash": "^4.17.11",
-        "slice-ansi": "2.0.0",
-        "string-width": "^2.1.1"
+        "slice-ansi": "^2.1.0",
+        "string-width": "^3.0.0"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
+          "integrity": "sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg==",
+          "dev": true
+        },
+        "is-fullwidth-code-point": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
+          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
+          "dev": true
+        },
+        "string-width": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
+          "integrity": "sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==",
+          "dev": true,
+          "requires": {
+            "emoji-regex": "^7.0.1",
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^5.1.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
+          "integrity": "sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^4.1.0"
+          }
+        }
       }
     },
     "tarn": {
-      "version": "1.1.4",
-      "resolved": "https://registry.npmjs.org/tarn/-/tarn-1.1.4.tgz",
-      "integrity": "sha512-j4samMCQCP5+6Il9/cxCqBd3x4vvlLeVdoyGex0KixPKl4F8LpNbDSC6NDhjianZgUngElRr9UI1ryZqJDhwGg=="
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/tarn/-/tarn-1.1.5.tgz",
+      "integrity": "sha512-PMtJ3HCLAZeedWjJPgGnCvcphbCOMbtZpjKgLq3qM5Qq9aQud+XHrL0WlrlgnTyS8U+jrjGbEXprFcQrxPy52g=="
     },
     "template2env": {
       "version": "1.0.4",
@@ -6262,7 +6478,7 @@
     },
     "through": {
       "version": "2.3.8",
-      "resolved": "http://registry.npmjs.org/through/-/through-2.3.8.tgz",
+      "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
       "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU="
     },
     "through2": {
@@ -6405,23 +6621,16 @@
       }
     },
     "uglify-js": {
-      "version": "3.4.9",
-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.4.9.tgz",
-      "integrity": "sha512-8CJsbKOtEbnJsTyv6LE6m6ZKniqMiFWmm9sRbopbkGs3gMPPfd3Fh8iIA4Ykv5MgaTbqHr4BaoGLJLZNhsrW1Q==",
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.6.0.tgz",
+      "integrity": "sha512-W+jrUHJr3DXKhrsS7NUVxn3zqMOFn0hL/Ei6v0anCIMoKC93TjcflTagwIHLW7SfMFfiQuktQyFVCFHGUE0+yg==",
       "dev": true,
       "optional": true,
       "requires": {
-        "commander": "~2.17.1",
+        "commander": "~2.20.0",
         "source-map": "~0.6.1"
       },
       "dependencies": {
-        "commander": {
-          "version": "2.17.1",
-          "resolved": "https://registry.npmjs.org/commander/-/commander-2.17.1.tgz",
-          "integrity": "sha512-wPMUt6FnH2yzG95SA6mzjQOEKUU3aLaDEmzs1ti+1E9h+CsrZghRlqEM/EJ4KscsQVG8uNN4uVreUeT8+drlgg==",
-          "dev": true,
-          "optional": true
-        },
         "source-map": {
           "version": "0.6.1",
           "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
@@ -6544,9 +6753,9 @@
       "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA=="
     },
     "v8flags": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.1.1.tgz",
-      "integrity": "sha512-iw/1ViSEaff8NJ3HLyEjawk/8hjJib3E7pvG4pddVXfUg1983s3VGsiClDjhK64MQVDGqc1Q8r18S4VKQZS9EQ==",
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.1.3.tgz",
+      "integrity": "sha512-amh9CCg3ZxkzQ48Mhcb8iX7xpAfYJgePHxWMQCBWECpOSqJUXgY26ncA61UTV0BkPqfhcy6mzwCIoP4ygxpW8w==",
       "requires": {
         "homedir-polyfill": "^1.0.1"
       }
@@ -6640,10 +6849,9 @@
       }
     },
     "which-module": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
-      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=",
-      "dev": true
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/which-module/-/which-module-1.0.0.tgz",
+      "integrity": "sha1-u6Y8qGGUiZT/MHc2CJ47lgJsKk8="
     },
     "window-size": {
       "version": "0.2.0",
@@ -6658,44 +6866,11 @@
     },
     "wrap-ansi": {
       "version": "2.1.0",
-      "resolved": "http://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
       "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
       "requires": {
         "string-width": "^1.0.1",
         "strip-ansi": "^3.0.1"
-      },
-      "dependencies": {
-        "ansi-regex": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
-          "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8="
-        },
-        "is-fullwidth-code-point": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
-          "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
-          "requires": {
-            "number-is-nan": "^1.0.0"
-          }
-        },
-        "string-width": {
-          "version": "1.0.2",
-          "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
-          "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
-          "requires": {
-            "code-point-at": "^1.0.0",
-            "is-fullwidth-code-point": "^1.0.0",
-            "strip-ansi": "^3.0.0"
-          }
-        },
-        "strip-ansi": {
-          "version": "3.0.1",
-          "resolved": "http://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
-          "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
-          "requires": {
-            "ansi-regex": "^2.0.0"
-          }
-        }
       }
     },
     "wrappy": {
@@ -6704,18 +6879,18 @@
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
     },
     "write": {
-      "version": "0.2.1",
-      "resolved": "https://registry.npmjs.org/write/-/write-0.2.1.tgz",
-      "integrity": "sha1-X8A4KOJkzqP+kUVUdvejxWbLB1c=",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/write/-/write-1.0.3.tgz",
+      "integrity": "sha512-/lg70HAjtkUgWPVZhZcm+T4hkL8Zbtp1nFNOn3lRrxnlv50SRBv7cR7RqR+GMsd3hUXy9hWBo4CHTbFTcOYwig==",
       "dev": true,
       "requires": {
         "mkdirp": "^0.5.1"
       }
     },
     "write-file-atomic": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.3.0.tgz",
-      "integrity": "sha512-xuPeK4OdjWqtfi59ylvVL0Yn35SF3zgcAcv7rBPFHVaEapaDr4GdGgm3j7ckTwH9wHL7fGmgfAnb0+THrHb8tA==",
+      "version": "2.4.3",
+      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.4.3.tgz",
+      "integrity": "sha512-GaETH5wwsX+GcnzhPgKcKjJ6M2Cq3/iZp1WyY/X1CSqrW+jVNM9Y7D8EC2sM4ZG/V8wZlSniJnCKWPmBYAucRQ==",
       "dev": true,
       "requires": {
         "graceful-fs": "^4.1.11",
@@ -6755,32 +6930,33 @@
       "dev": true
     },
     "yargs": {
-      "version": "11.1.0",
-      "resolved": "http://registry.npmjs.org/yargs/-/yargs-11.1.0.tgz",
-      "integrity": "sha512-NwW69J42EsCSanF8kyn5upxvjp5ds+t3+udGBeTbFnERA+lF541DDpMawzo4z6W/QrzNM18D+BPMiOBibnFV5A==",
-      "dev": true,
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-5.0.0.tgz",
+      "integrity": "sha1-M1UUSXfQV1fbuG1uOOwFYSOzpm4=",
       "requires": {
-        "cliui": "^4.0.0",
+        "cliui": "^3.2.0",
         "decamelize": "^1.1.1",
-        "find-up": "^2.1.0",
         "get-caller-file": "^1.0.1",
-        "os-locale": "^2.0.0",
+        "lodash.assign": "^4.2.0",
+        "os-locale": "^1.4.0",
+        "read-pkg-up": "^1.0.1",
         "require-directory": "^2.1.1",
         "require-main-filename": "^1.0.1",
         "set-blocking": "^2.0.0",
-        "string-width": "^2.0.0",
-        "which-module": "^2.0.0",
+        "string-width": "^1.0.2",
+        "which-module": "^1.0.0",
+        "window-size": "^0.2.0",
         "y18n": "^3.2.1",
-        "yargs-parser": "^9.0.2"
+        "yargs-parser": "^3.2.0"
       }
     },
     "yargs-parser": {
-      "version": "9.0.2",
-      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-9.0.2.tgz",
-      "integrity": "sha1-nM9qQ0YP5O1Aqbto9I1DuKaMwHc=",
-      "dev": true,
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-3.2.0.tgz",
+      "integrity": "sha1-UIE1XRnZ0MjF2BrakIy05tGGZk8=",
       "requires": {
-        "camelcase": "^4.1.0"
+        "camelcase": "^3.0.0",
+        "lodash.assign": "^4.1.0"
       }
     }
   }
diff --git a/package.json b/package.json
index 7847d29..4e0c784 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,8 @@
     "knex": "^0.15.2",
     "pg": "7.4.3",
     "pg-query-stream": "^1.1.1",
-    "postgres-migrations": "^3.0.2"
+    "postgres-migrations": "^3.0.2",
+    "redlock": "^3.1.2"
   },
   "devDependencies": {
     "coveralls": "^3.0.1",
diff --git a/redis/index.js b/redis/index.js
index c5f84a8..ab69964 100644
--- a/redis/index.js
+++ b/redis/index.js
@@ -4,7 +4,9 @@ const bluebird = require('bluebird'),
   Redis = require('ioredis'),
   { REDIS_URL, REDIS_HASH } = require('../services/constants'),
   { isPublished, isUri, isUser } = require('clayutils'),
-  { notFoundError, logGenericError } = require('../services/errors');
+  { notFoundError, logGenericError } = require('../services/errors'),
+  lock = require('./lock');
+
 var log = require('../services/log').setup({ file: __filename });
 
 /**
@@ -26,6 +28,8 @@ function createClient(testRedisUrl) {
     module.exports.client = bluebird.promisifyAll(new Redis(redisUrl));
     module.exports.client.on('error', logGenericError(__filename));
 
+    lock.setupRedlock(module.exports.client);
+
     resolve({ server: redisUrl });
   });
 }
@@ -108,6 +112,7 @@ function del(key) {
 }
 
 module.exports.client = null;
+module.exports.applyLock = lock.applyLock;
 module.exports.createClient = createClient;
 module.exports.get = get;
 module.exports.put = put;
diff --git a/redis/lock.js b/redis/lock.js
new file mode 100644
index 0000000..efbad36
--- /dev/null
+++ b/redis/lock.js
@@ -0,0 +1,215 @@
+'use strict';
+
+const bluebird = require('bluebird'),
+  { logGenericError } = require('../services/errors'),
+  CONFIG = {
+    // the expected clock drift; for more details
+    // see http://redis.io/topics/distlock
+    driftFactor: 0.01, // time in ms
+
+    // the max number of times Redlock will attempt
+    // to lock a resource before erroring
+    retryCount: 0,
+
+    // the time in ms between attempts
+    retryDelay: 200, // time in ms
+
+    // the max time in ms randomly added to retries
+    // to improve performance under high contention
+    // see https://www.awsarchitectureblog.com/2015/03/backoff.html
+    retryJitter: 200 // time in ms
+  },
+  STATE = {
+    ONGOING: 'ON-GOING',
+    RETRY: 'RETRY',
+    FINISHED: 'FINISHED'
+  },
+  RETRY_TIME = 1500, // ms
+  KEY_TTL = 10 * 60, // secs
+  LOCK_TTL = 5000; // ms
+
+let log = require('../services/log').setup({ file: __filename }),
+  Redlock = require('redlock'),
+  _logGenericError = logGenericError(__filename),
+  actionRetryCount = 0,
+  actionRetryTotal = 5;
+
+/**
+ * Adds a lock to redis with the given lockName
+ * for a determined period of time
+ *
+ * @param {string} lockName
+ * @param {number} ttl
+ * @returns {Promise}
+ */
+function addLock(lockName, ttl) {
+  log('trace', `Trying to lock redis for resource id ${lockName}`, {
+    lockName,
+    processId: process.pid
+  });
+  return module.exports.redlock.lock(lockName, ttl);
+}
+
+/**
+ * Removes the specified lock
+ * when the callback returns
+ *
+ * @param {Object} lock
+ * @param {string} lockName
+ * @param {Function} promise
+ * @returns {Promise}
+ */
+function removeLockWhenReady(lock, lockName, promise) {
+  return promise().then(result => {
+    return module.exports.redlock.unlock(lock).then(() => {
+      log('trace', `Releasing lock for resource id ${lockName}`, {
+        lockName,
+        processId: process.pid
+      });
+
+      return result;
+    });
+  });
+}
+
+/**
+ * Gets the value of the specified key in redis
+ *
+ * @param {string} key
+ * @returns {Promise}
+ */
+function getState(key) {
+  return module.exports.redis.getAsync(key);
+}
+
+/**
+ * Sets a key-value pair into redis.
+ * This key will have an expire time if specified
+ * @param {string} key
+ * @param {string} value
+ * @param {number} expireTime
+ * @returns {Promise}
+ */
+function setState(key, value, expireTime) {
+  return module.exports.redis.setAsync(key, value).then(() => {
+    if (expireTime) return module.exports.redis.expire(key, expireTime);
+  });
+}
+
+/**
+ * Waits an amount of time
+ *
+ * @param {number} ms
+ * @returns {Promise}
+ */
+function delay(ms = RETRY_TIME) {
+  return bluebird.delay(ms);
+}
+
+/**
+ * Implements the lock on redis.
+ * Delays further retries while the
+ * callback is running.
+ *
+ * If something fails, it tries to
+ * apply the lock again for a certain
+ * amount of times.
+ *
+ * @param {string} action
+ * @param {Function} cb
+ * @returns {Promise}
+ */
+function applyLock(action, cb) {
+  const lockName = `${action}-lock`;
+
+  return getState(action).then(state => {
+    if (state === STATE.FINISHED) return;
+
+    /**
+     * If it's ONGOING, just re-run this function after a while
+     * to see if the state changed.
+     */
+    if (state === STATE.ONGOING) {
+      return delay()
+        .then(() => applyLock(action, cb));
+    }
+
+    if (!state || state === STATE.RETRY)
+      return lockAndExecute(action, lockName, cb)
+        .catch(() => retryLocking(action, cb));
+  });
+}
+
+/**
+ * Sets the lock on redis and removes it
+ * when the callback is done
+ *
+ * @param {string} action
+ * @param {string} lockName
+ * @param {Function} cb
+ * @returns {Promise}
+ */
+function lockAndExecute(action, lockName, cb) {
+  return setState(action, STATE.ONGOING)
+    .then(() => addLock(lockName, LOCK_TTL))
+    .then(lock => removeLockWhenReady(lock, lockName, cb))
+    .then(() => setState(action, STATE.FINISHED, KEY_TTL));
+}
+
+/**
+ * Sets the state to RETRY and runs the lock again.
+ * After a number of retries, it gives up and sets the
+ * state to FINISHED.
+ *
+ * @param {string} action
+ * @param {Function} cb
+ * @returns {Promise}
+ */
+function retryLocking(action, cb) {
+  actionRetryCount++;
+
+  if (actionRetryCount >= actionRetryTotal) {
+    log('error', `Action "${action}" could not be executed`);
+    return setState(action, STATE.FINISHED, KEY_TTL);
+  }
+
+  return setState(action, STATE.RETRY)
+    .then(delay)
+    .then(() => applyLock(action, cb));
+}
+
+/**
+ * Saves both the redis and redlock instance
+ * into the module
+ *
+ * @param {Object} instance Redis instance
+ * @returns {Object} Redlock instance
+ */
+function setupRedlock(instance) {
+  const redlock = new Redlock([instance], CONFIG);
+
+  redlock.on('clientError', _logGenericError);
+
+  module.exports.redis = instance;
+  module.exports.redlock = redlock;
+
+  return redlock;
+}
+
+module.exports.redis;
+module.exports.redlock;
+module.exports.setupRedlock = setupRedlock;
+module.exports.applyLock = applyLock;
+
+module.exports.stubRedlockModule = mock => Redlock = mock;
+module.exports.stubLogGenericError = mock => _logGenericError = mock;
+module.exports.stubLog = mock => log = mock;
+module.exports.stubActionRetryTotal = mock => actionRetryTotal = mock;
+
+module.exports.addLock = addLock;
+module.exports.removeLockWhenReady = removeLockWhenReady;
+module.exports.getState = getState;
+module.exports.setState = setState;
+module.exports.delay = delay;
+module.exports.lockAndExecute = lockAndExecute;
+module.exports.retryLocking = retryLocking;
diff --git a/redis/lock.test.js b/redis/lock.test.js
new file mode 100644
index 0000000..96eb3ed
--- /dev/null
+++ b/redis/lock.test.js
@@ -0,0 +1,223 @@
+'use strict';
+
+const lockModule = require('./lock'),
+  REDIS_CLIENT = {
+    getAsync: jest.fn().mockResolvedValue(),
+    setAsync: jest.fn().mockResolvedValue(),
+    expire: jest.fn()
+  },
+  fakeGenericErrorLog = jest.fn(),
+  fakeLog = jest.fn(),
+  fakeRedlockInstance = {
+    lock: jest.fn().mockResolvedValue(),
+    unlock: jest.fn().mockResolvedValue()
+  },
+  redlockModule = jest.genMockFromModule('redlock'),
+  bluebird = require('bluebird');
+
+bluebird.delay = jest.fn().mockResolvedValue();
+
+describe('redis/lock', () => {
+  beforeEach(() => {
+    lockModule.stubActionRetryTotal(5);
+    lockModule.stubLogGenericError(fakeGenericErrorLog);
+    lockModule.stubLog(fakeLog);
+    lockModule.redlock = fakeRedlockInstance;
+    lockModule.redis = REDIS_CLIENT;
+  });
+
+  afterEach(() => {
+    jest.restoreAllMocks();
+  });
+
+  describe('setupRedlock', () => {
+    test('Returns redlock instance', () => {
+      lockModule.stubRedlockModule(redlockModule);
+
+      const redlockClient = lockModule.setupRedlock(REDIS_CLIENT);
+
+      expect(redlockClient).toBeInstanceOf(redlockModule);
+      expect(redlockClient.on).toHaveBeenCalledWith('clientError', fakeGenericErrorLog);
+    });
+  });
+
+  describe('getState', () => {
+    test('It should call redis getAsync', () => {
+      const key = 'some/key';
+
+      return lockModule.getState(key)
+        .then(() =>
+          expect(REDIS_CLIENT.getAsync).toBeCalledWith(key));
+    });
+  });
+
+  describe('setState', () => {
+    const key = 'some/key',
+      value = 'some/value',
+      ttl = 2000;
+
+    test('It should call redis setAsync', () => {
+      return lockModule.setState(key, value)
+        .then(() =>
+          expect(REDIS_CLIENT.setAsync).toBeCalledWith(key, value));
+    });
+
+    test('It should call redis expire if a TTL is passed', () => {
+      return lockModule.setState(key, value, ttl)
+        .then(() => {
+          expect(REDIS_CLIENT.setAsync).toBeCalledWith(key, value);
+          expect(REDIS_CLIENT.expire).toBeCalledWith(key, ttl);
+        });
+    });
+  });
+
+  describe('removeLockWhenReady', () => {
+    const lockName = 'someName',
+      fakeLock = {},
+      promiseReturnValue = 'some/value';
+
+    let somePromise;
+
+    beforeEach(() => {
+      somePromise = jest.fn().mockResolvedValue(promiseReturnValue);
+      lockModule.redlock.unlock.mockResolvedValue();
+    });
+
+    test('Callback is called', () => {
+      return lockModule.removeLockWhenReady(fakeLock, lockName, somePromise)
+        .then(() => expect(somePromise).toBeCalled());
+    });
+
+    test('Redis unlock is called if callback succeeds', () => {
+      return lockModule.removeLockWhenReady(fakeLock, lockName, somePromise)
+        .then(() => expect(lockModule.redlock.unlock).toBeCalled());
+    });
+
+    test('Redis unlock is not called if callback fails', () => {
+      somePromise = jest.fn().mockRejectedValue();
+
+      return lockModule.removeLockWhenReady(fakeLock, lockName, somePromise)
+        .catch(() => expect(lockModule.redlock.unlock).not.toBeCalled());
+    });
+
+    test('Lock release is logged if unlock succeeds', () => {
+      return lockModule.removeLockWhenReady(fakeLock, lockName, somePromise)
+        .then(() =>
+          expect(fakeLog).toBeCalledWith(
+            'trace',
+            `Releasing lock for resource id ${lockName}`,
+            { lockName, processId: process.pid }
+          ));
+    });
+
+    test('Returns whatever the callback returns', () => {
+      return lockModule.removeLockWhenReady(fakeLock, lockName, somePromise)
+        .then(result => expect(result).toBe(promiseReturnValue));
+    });
+  });
+
+  describe('addLock', () => {
+    const lockName = 'some-name',
+      ttl = 2000;
+
+    test('Should call redlock.lock', () => {
+      lockModule.redlock.lock.mockResolvedValue();
+
+      return lockModule.addLock(lockName, ttl).then(() => {
+        expect(lockModule.redlock.lock).toBeCalledWith(lockName, ttl);
+      });
+    });
+
+    test('Message is logged when addLock is called', () => {
+      return lockModule.addLock(lockName, ttl).then(() =>
+        expect(fakeLog).toBeCalledWith(
+          'trace',
+          `Trying to lock redis for resource id ${lockName}`,
+          { lockName, processId: process.pid }
+        ));
+    });
+  });
+
+  describe('retryLocking', () => {
+    const action = 'some-action',
+      callback = jest.fn().mockResolvedValue();
+
+    test('Sets the state to RETRY if the retries are not over', () => {
+      return lockModule.retryLocking(action, callback).then(() => {
+        expect(REDIS_CLIENT.setAsync.mock.calls[0][1]).toBe('RETRY');
+      });
+    });
+
+    test('Sets the state to FINISHED if the retries are over', () => {
+      lockModule.stubActionRetryTotal(2);
+      return lockModule.retryLocking(action, callback).then(() => {
+        expect(REDIS_CLIENT.setAsync.mock.calls[0][1]).toBe('FINISHED');
+      });
+    });
+  });
+
+  describe('lockAndExecute', () => {
+    const action = 'some-action',
+      lockName = 'some-action-lock',
+      somePromise = jest.fn().mockResolvedValue();
+
+    test('Sets the state to ongoing', () => {
+      return lockModule.lockAndExecute(action, lockName, somePromise).then(() => {
+        expect(REDIS_CLIENT.setAsync.mock.calls[0][1]).toBe('ON-GOING');
+      });
+    });
+
+    test('Adds the lock', () => {
+      return lockModule.lockAndExecute(action, lockName, somePromise).then(() => {
+        expect(fakeRedlockInstance.lock.mock.calls[0][0]).toBe(lockName);
+      });
+    });
+
+    test('Removes the lock', () => {
+      const someLock = { name: 'lock-name' };
+
+      fakeRedlockInstance.lock.mockResolvedValue(someLock);
+      return lockModule.lockAndExecute(action, lockName, somePromise).then(() => {
+        expect(fakeRedlockInstance.unlock.mock.calls[0][0]).toBe(someLock);
+      });
+    });
+
+    test('Sets the stage to finished with a TTL if everything succeeds', () => {
+      return lockModule.lockAndExecute(action, lockName, somePromise).then(() => {
+        expect(REDIS_CLIENT.setAsync.mock.calls[1][1]).toBe('FINISHED');
+      });
+    });
+  });
+
+  describe('applyLock', () => {
+    const action = 'some-action',
+      callback = jest.fn().mockResolvedValue();
+
+    test('When state is ONGOING, it should call delay', () => {
+      REDIS_CLIENT.getAsync.mockResolvedValueOnce('ON-GOING');
+      REDIS_CLIENT.getAsync.mockResolvedValueOnce('FINISHED');
+
+      return lockModule.applyLock(action, callback).then(() => {
+        expect(bluebird.delay).toBeCalledWith(1500);
+      });
+    });
+
+    test.each([undefined, 'RETRY'])('It should call retryLocking when state is %s and lockAndExecute fails', state => {
+      REDIS_CLIENT.getAsync.mockResolvedValueOnce(state);
+      REDIS_CLIENT.setAsync.mockRejectedValue('Not found');
+
+      return lockModule.applyLock(action, callback).catch(() => {
+        expect(REDIS_CLIENT.setAsync).toBeCalledWith(action, 'RETRY');
+      });
+    });
+
+    test('It should not run anything if the state has an unknown value', () => {
+      REDIS_CLIENT.getAsync.mockResolvedValueOnce('some-random-state');
+
+      return lockModule.applyLock(action, callback).then(() => {
+        expect(REDIS_CLIENT.setAsync).not.toBeCalled();
+        expect(REDIS_CLIENT.getAsync).toBeCalledTimes(1);
+      });
+    });
+  });
+});
diff --git a/services/db.js b/services/db.js
index 3ff87ef..a489c53 100644
--- a/services/db.js
+++ b/services/db.js
@@ -85,6 +85,7 @@ module.exports.put = put;
 module.exports.get = get;
 module.exports.del = del;
 module.exports.batch = batch;
+module.exports.applyLock = redis.applyLock;
 module.exports.raw = postgres.raw;
 module.exports.putMeta = postgres.putMeta;
 module.exports.getMeta = postgres.getMeta;