SchedulerSample.java

/*
 * #%L
 * Wisdom-Framework
 * %%
 * Copyright (C) 2013 - 2014 Wisdom Framework
 * %%
 * 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.
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package snippets.tasks;

import org.apache.felix.ipojo.annotations.Component;
import org.apache.felix.ipojo.annotations.Instantiate;
import org.apache.felix.ipojo.annotations.Requires;
import org.wisdom.api.concurrent.ManagedFutureTask;
import org.wisdom.api.concurrent.ManagedScheduledExecutorService;

import java.util.concurrent.Callable;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

/**
 * A component with scheduled tasks.
 */
// tag::scheduled[]
@Component
@Instantiate
public class SchedulerSample {

    @Requires(filter = "(name=" + ManagedScheduledExecutorService.SYSTEM + ")")
    ManagedScheduledExecutorService service;

    // Equivalent to this if you don't need the enhanced API

    @Requires(filter = "(name=" + ManagedScheduledExecutorService.SYSTEM + ")")
    ScheduledExecutorService executor;

    public void doSomething() {
        service.schedule(new Callable<String>() {
            @Override
            public String call() throws Exception {
                return "will be done tomorrow";
            }
        }, 1, TimeUnit.DAYS);

        // With handler
        ManagedFutureTask<?> task = service.scheduleAtFixedRate(new Runnable() {
            @Override
            public void run() {
                System.out.println("Happening in background");
            }
        }, 1, 5, TimeUnit.MINUTES);

        // Cancel it.
        task.cancel(true);
    }

}
// end::scheduled[]