docs: add a code snippet for the sync api (#24)

* Added a sync api code snippet

optimization/snippets/pom.xml

@@ -26,7 +26,7 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>
 
-  <!-- [START optimizationai_install_with_bom] -->
+
   <dependencyManagement>
     <dependencies>
       <dependency>
@@ -45,7 +45,6 @@
       <artifactId>google-cloud-optimization</artifactId>
       <version>0.1.1</version>
     </dependency>
-    <!-- [END optimizationai_install_with_bom] -->
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-storage</artifactId>

optimization/snippets/resources/sync_request.textproto

@@ -0,0 +1,64 @@
+# proto-file: google3/google/cloud/optimization/v1/fleet_routing.proto
+# proto-message: OptimizeToursRequest
+model {
+    shipments {
+      pickups {
+        arrival_location { latitude: 48.874507 longitude: 2.30361 }
+        time_windows {
+          start_time { seconds: 1000 }
+          end_time { seconds: 2000 }
+        }
+        duration { seconds: 150 }
+      }
+      deliveries {
+        arrival_location { latitude: 48.880942 longitude: 2.323866 }
+        time_windows {
+          start_time { seconds: 3000 }
+          end_time { seconds: 4000 }
+        }
+        duration: { seconds: 250 }
+      }
+      load_demands {
+        key: "weight"
+        value: { amount: 10 }
+      }
+    }
+    shipments {
+      pickups {
+        arrival_location { latitude: 48.880943 longitude: 2.323867 }
+        time_windows {
+          start_time { seconds: 1001 }
+          end_time { seconds: 2001 }
+        }
+        duration { seconds: 151 }
+      }
+      deliveries {
+        arrival_location { latitude: 48.880940 longitude: 2.323844 }
+        time_windows {
+          start_time { seconds: 3001 }
+          end_time { seconds: 4001 }
+        }
+        duration { seconds: 251 }
+      }
+      load_demands {
+        key: "weight"
+        value: { amount: 20 }
+      }
+    }
+    vehicles {
+      start_location { latitude: 48.863102 longitude: 2.341204 }
+      end_location { latitude: 48.863110 longitude: 2.341205 }
+      load_limits {
+        key: "weight"
+        value: { max_load: 50 }
+      }
+    }
+    vehicles {
+      start_location { latitude: 48.863112 longitude: 2.341214 }
+      end_location { latitude: 48.863120 longitude: 2.341215 }
+      load_limits {
+        key: "weight"
+        value: { max_load: 60 }
+      }
+    }
+  }

optimization/snippets/src/main/java/com/example/optimizationai/SyncApi.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;
+
+// [START cloudoptimization_sync_api]
+
+import com.google.cloud.optimization.v1.FleetRoutingClient;
+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.
+ * A sample sync_request.textproto file can be found in the resources folder.
+ */
+public class SyncApi {
+  public static void callSyncApi() throws Exception {
+    // TODO(developer): Replace these variables before running the sample.
+    String projectParent = "projects/{YOUR_GCP_PROJECT_ID}";
+    String modelPath = "YOUR_MODEL_PATH";
+    callSyncApi(projectParent, modelPath);
+  }
+
+  public static void callSyncApi(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);
+    FleetRoutingClient fleetRoutingClient = FleetRoutingClient.create();
+    OptimizeToursResponse response = fleetRoutingClient.optimizeTours(requestBuilder.build());
+    System.out.println(response.toString());
+  }
+}
+// [END cloudoptimization_sync_api]

optimization/snippets/src/test/java/com/example/optimizationai/SyncApiTest.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 SyncApi sample. */
+public class SyncApiTest {
+  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 {
+    SyncApi.callSyncApi(PROJECT_PARENT, MODEL_PATH);
+    String got = bout.toString();
+    assertThat(got).contains("routes");
+  }
+}