LifecycleExample.java

/*
 * Copyright 2013 Netflix, Inc.
 *
 *    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 lifecycle;

import com.google.inject.Injector;
import com.netflix.governator.guice.LifecycleInjector;
import com.netflix.governator.lifecycle.LifecycleManager;

public class LifecycleExample
{
    public static void main(String[] args) throws Exception
    {
        // Always get the Guice injector from Governator
        Injector injector = LifecycleInjector.builder().createInjector();

        // This causes ExampleService and its dependency, ExampleResource, to get instantiated
        injector.getInstance(ExampleService.class);

        LifecycleManager manager = injector.getInstance(LifecycleManager.class);

        // Always start the Lifecycle Manager
        manager.start();

        // your app would execute here

        // Always close the Lifecycle Manager at app end
        manager.close();

        /*
            The console output should show:
                ExampleResource construction
                ExampleResource setup
                ExampleService construction
                ExampleService setup
                ExampleService tearDown
                ExampleResource tearDown
         */
    }
}