samples: add long timeout sample (#27)

* docs: add long timeout sample

* fix lint

* rm unused variable

* fix package

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optimization/snippets/src/main/java/com/example/optimizationai/SyncApiWithLongTimeout.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * 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.example.optimizationai;
+
+// [START cloudoptimization_long_timeout]
+
+import com.google.cloud.optimization.v1.FleetRoutingClient;
+import com.google.cloud.optimization.v1.FleetRoutingSettings;
+import com.google.cloud.optimization.v1.OptimizeToursRequest;
+import com.google.cloud.optimization.v1.OptimizeToursResponse;
+import com.google.protobuf.Duration;
+import com.google.protobuf.TextFormat;
+import java.io.FileInputStream;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+
+/**
+ * This is an example to send a request to Cloud Fleet Routing synchronous API via Java API Client.
+ */
+public class SyncApiWithLongTimeout {
+  public static void longTimeout() throws Exception {
+    // TODO(developer): Replace these variables before running the sample.
+    String projectParent = "projects/{YOUR_GCP_PROJECT_ID}";
+    String modelPath = "YOUR_MODEL_PATH";
+    longTimeout(projectParent, modelPath);
+  }
+
+  public static void longTimeout(String projectParent, String modelPath) throws Exception {
+    int timeoutSeconds = 100;
+    InputStream modelInputstream = new FileInputStream(modelPath);
+    Reader modelInputStreamReader = new InputStreamReader(modelInputstream);
+    OptimizeToursRequest.Builder requestBuilder =
+        OptimizeToursRequest.newBuilder()
+            .setTimeout(Duration.newBuilder().setSeconds(timeoutSeconds).build())
+            .setParent(projectParent);
+    TextFormat.getParser().merge(modelInputStreamReader, requestBuilder);
+
+    // Checks the gRPC connection every 5 mins and keeps it alive.
+    FleetRoutingClient fleetRoutingClientClient =
+        FleetRoutingClient.create(
+            FleetRoutingSettings.newBuilder()
+                .setTransportChannelProvider(
+                    FleetRoutingSettings.defaultGrpcTransportProviderBuilder()
+                        .setKeepAliveTime(org.threeten.bp.Duration.ofSeconds(300))
+                        .build())
+                .build());
+    OptimizeToursResponse response = fleetRoutingClientClient.optimizeTours(requestBuilder.build());
+    System.out.println(response.toString());
+  }
+}
+// [END cloudoptimization_long_timeout]

optimization/snippets/src/test/java/com/example/optimizationai/SyncApiWithLongTimeoutTest.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * 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.example.optimizationai;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+/** Tests for SyncApiWithLongTimeout sample. */
+public class SyncApiWithLongTimeoutTest {
+  private static final String PROJECT_ID = System.getenv("GOOGLE_CLOUD_PROJECT");
+  private static final String PROJECT_PARENT = String.format("projects/%s", PROJECT_ID);
+  private static final String MODEL_PATH = "resources/sync_request.textproto";
+
+  private ByteArrayOutputStream bout;
+  private PrintStream out;
+  private PrintStream originalPrintStream;
+
+  @Before
+  public void setUp() {
+    bout = new ByteArrayOutputStream();
+    out = new PrintStream(bout);
+    originalPrintStream = System.out;
+    System.setOut(out);
+  }
+
+  @After
+  public void tearDown() {
+    System.out.flush();
+    System.setOut(originalPrintStream);
+  }
+
+  @Test
+  public void testSyncApi() throws Exception {
+    SyncApiWithLongTimeout.longTimeout(PROJECT_PARENT, MODEL_PATH);
+    String got = bout.toString();
+    assertThat(got).contains("routes");
+  }
+}