/*
* 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 validation;
import com.google.inject.Injector;
import com.netflix.governator.configuration.SystemConfigurationProvider;
import com.netflix.governator.guice.BootstrapBinder;
import com.netflix.governator.guice.BootstrapModule;
import com.netflix.governator.guice.LifecycleInjector;
import com.netflix.governator.lifecycle.LifecycleManager;
import com.netflix.governator.lifecycle.ValidationException;
public class ValidationExample
{
public static void main(String[] args) throws Exception
{
// this example combines a number of Governator features.
// It shows validation, AutoBindSingleton and @Configuration
try
{
// There are no properties set which will cause
// the fields of ExampleObject to stay at their defaults.
// Their defaults violate their constraint annotations
// thus an exception will be thrown
doWork();
}
catch ( ValidationException e )
{
// correct
}
// set the annotation properties so that the constraints are not violated
System.setProperty("value", "8");
System.setProperty("str", "a string");
doWork();
}
private static void doWork() throws Exception
{
// Always get the Guice injector from Governator
Injector injector = LifecycleInjector
.builder()
.usingBasePackages("validation")
.withBootstrapModule
(
new BootstrapModule()
{
@Override
public void configure(BootstrapBinder binder)
{
binder.bindConfigurationProvider().to(SystemConfigurationProvider.class);
}
}
)
.createInjector();
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();
}
}