Introduce RedisLoadingException to represent Redis LOADING response #682

src/main/java/com/lambdaworks/redis/ExceptionFactory.java

@@ -19,7 +19,7 @@
 
 /**
  * Factory for Redis exceptions.
- * 
+ *
  * @author Mark Paluch
  * @since 4.5
  */
@@ -30,7 +30,7 @@ private ExceptionFactory() {
 
     /**
      * Create a {@link RedisCommandTimeoutException} with a detail message given the timeout.
-     * 
+     *
      * @param timeout the timeout value.
      * @param unit the {@link TimeUnit}.
      * @return the {@link RedisCommandTimeoutException}.
@@ -41,7 +41,7 @@ public static RedisCommandTimeoutException createTimeoutException(long timeout,
 
     /**
      * Create a {@link RedisCommandTimeoutException} with a detail message given the message and timeout.
-     * 
+     *
      * @param message the detail message.
      * @param timeout the timeout value.
      * @param unit the {@link TimeUnit}.
@@ -54,7 +54,7 @@ public static RedisCommandTimeoutException createTimeoutException(String message
     /**
      * Create a {@link RedisCommandExecutionException} with a detail message. Specific Redis error messages may create subtypes
      * of {@link RedisCommandExecutionException}.
-     * 
+     *
      * @param message the detail message.
      * @return the {@link RedisCommandExecutionException}.
      */
@@ -65,7 +65,7 @@ public static RedisCommandExecutionException createExecutionException(String mes
     /**
      * Create a {@link RedisCommandExecutionException} with a detail message and optionally a {@link Throwable cause}. Specific
      * Redis error messages may create subtypes of {@link RedisCommandExecutionException}.
-     * 
+     *
      * @param message the detail message.
      * @param cause the nested exception, may be {@literal null}.
      * @return the {@link RedisCommandExecutionException}.
@@ -82,6 +82,10 @@ public static RedisCommandExecutionException createExecutionException(String mes
                 return cause != null ? new RedisNoScriptException(message, cause) : new RedisNoScriptException(message);
             }
 
+            if (message.startsWith("LOADING")) {
+                return cause != null ? new RedisLoadingException(message, cause) : new RedisLoadingException(message);
+            }
+
             return cause != null ? new RedisCommandExecutionException(message, cause) : new RedisCommandExecutionException(
                     message);
         }

src/main/java/com/lambdaworks/redis/RedisLoadingException.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2018 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.lambdaworks.redis;
+
+/**
+ * Exception that gets thrown when Redis is loading a dataset into memory and replying with a {@code LOADING} error response.
+ *
+ * @author Mark Paluch
+ * @since 4.5
+ */
+@SuppressWarnings("serial")
+public class RedisLoadingException extends RedisCommandExecutionException {
+
+    /**
+     * Create a {@code RedisLoadingException} with the specified detail message.
+     *
+     * @param msg the detail message.
+     */
+    public RedisLoadingException(String msg) {
+        super(msg);
+    }
+
+    /**
+     * Create a {@code RedisLoadingException} with the specified detail message and nested exception.
+     *
+     * @param msg the detail message.
+     * @param cause the nested exception.
+     */
+    public RedisLoadingException(String msg, Throwable cause) {
+        super(msg, cause);
+    }
+}

src/test/java/com/lambdaworks/redis/ExceptionFactoryTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017 the original author or authors.
+ * Copyright 2017-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -55,4 +55,14 @@ public void shouldCreateExecutionException() {
         assertThat(ExceptionFactory.createExecutionException(null, new IllegalStateException())).isInstanceOf(
                 RedisCommandExecutionException.class).hasRootCauseInstanceOf(IllegalStateException.class);
     }
-}
+
+    @Test
+    public void shouldCreateLoadingException() {
+
+        assertThat(ExceptionFactory.createExecutionException("LOADING foo bar")).isInstanceOf(RedisLoadingException.class)
+                .hasMessage("LOADING foo bar").hasNoCause();
+        assertThat(ExceptionFactory.createExecutionException("LOADING foo bar", new IllegalStateException()))
+                .isInstanceOf(RedisLoadingException.class).hasMessage("LOADING foo bar")
+                .hasRootCauseInstanceOf(IllegalStateException.class);
+    }
+}