adds a closeable extension to MongoClient (fixes #193)

MongoClient provides a close method but does not implement the AutoCloseable
interface. And the restx factory during its 'close' process is calling close
methods on every components implementing the AutoCloseable interface.

So the solution for this problem is to override MongoClient in order to implement
the AutoCloseable interface.

Author: a-peyrard

restx-jongo/src/main/java/restx/mongo/CloseableMongoClient.java

@@ -0,0 +1,69 @@
+package restx.mongo;
+
+import com.mongodb.MongoClient;
+import com.mongodb.MongoClientOptions;
+import com.mongodb.MongoClientURI;
+import com.mongodb.MongoCredential;
+import com.mongodb.ServerAddress;
+
+import java.net.UnknownHostException;
+import java.util.List;
+
+/**
+ * Simple extension of the MongoClient in order to add the {@link AutoCloseable} type.
+ *
+ * @author apeyrard
+ */
+public class CloseableMongoClient extends MongoClient implements AutoCloseable {
+
+	public CloseableMongoClient() throws UnknownHostException {
+	}
+
+	public CloseableMongoClient(String host) throws UnknownHostException {
+		super(host);
+	}
+
+	public CloseableMongoClient(String host, MongoClientOptions options) throws UnknownHostException {
+		super(host, options);
+	}
+
+	public CloseableMongoClient(String host, int port) throws UnknownHostException {
+		super(host, port);
+	}
+
+	public CloseableMongoClient(ServerAddress addr) {
+		super(addr);
+	}
+
+	public CloseableMongoClient(ServerAddress addr, List<MongoCredential> credentialsList) {
+		super(addr, credentialsList);
+	}
+
+	public CloseableMongoClient(ServerAddress addr, MongoClientOptions options) {
+		super(addr, options);
+	}
+
+	public CloseableMongoClient(ServerAddress addr, List<MongoCredential> credentialsList, MongoClientOptions options) {
+		super(addr, credentialsList, options);
+	}
+
+	public CloseableMongoClient(List<ServerAddress> seeds) {
+		super(seeds);
+	}
+
+	public CloseableMongoClient(List<ServerAddress> seeds, List<MongoCredential> credentialsList) {
+		super(seeds, credentialsList);
+	}
+
+	public CloseableMongoClient(List<ServerAddress> seeds, MongoClientOptions options) {
+		super(seeds, options);
+	}
+
+	public CloseableMongoClient(List<ServerAddress> seeds, List<MongoCredential> credentialsList, MongoClientOptions options) {
+		super(seeds, credentialsList, options);
+	}
+
+	public CloseableMongoClient(MongoClientURI uri) throws UnknownHostException {
+		super(uri);
+	}
+}

restx-jongo/src/main/java/restx/mongo/MongoModule.java

@@ -27,7 +27,7 @@ public class MongoModule {
     @Provides @Named(MONGO_CLIENT_NAME)
     public MongoClient mongoClient(MongoSettings settings) {
         try {
-            return new MongoClient(new MongoClientURI(settings.uri()));
+            return new CloseableMongoClient(new MongoClientURI(settings.uri()));
         } catch (UnknownHostException e) {
             throw new RuntimeException(e);
         }