org.rapidoid.activity.AbstractThreadActivity Maven / Gradle / Ivy
/*-
* #%L
* rapidoid-commons
* %%
* Copyright (C) 2014 - 2017 Nikolche Mihajlovski and contributors
* %%
* 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.
* #L%
*/
package org.rapidoid.activity;
import org.rapidoid.annotation.Authors;
import org.rapidoid.annotation.Since;
import org.rapidoid.log.Log;
import java.util.concurrent.CancellationException;
@Authors("Nikolche Mihajlovski")
@Since("2.0.0")
public abstract class AbstractThreadActivity extends LifecycleActivity implements Runnable {
protected final Thread thread;
public AbstractThreadActivity(String name) {
super(name);
this.thread = new RapidoidThread(this, name);
}
@Override
public T start() {
checkActive(false);
thread.start();
return super.start();
}
@SuppressWarnings("deprecation")
@Override
public T halt() {
checkActive(true);
thread.stop();
try {
thread.join();
} catch (InterruptedException e) {
// do nothing
}
return super.halt();
}
@Override
public T shutdown() {
checkActive(true);
thread.interrupt();
try {
thread.join();
} catch (InterruptedException e) {
// do nothing
}
return super.shutdown();
}
@Override
public final void run() {
Log.info("Starting activity thread", "name", name);
try {
while (!Thread.interrupted()) {
try {
loop();
} catch (CancellationException e) {
Log.info("Interrupted activity thread", "name", name);
return;
} catch (Exception e) {
onError(e);
}
}
} catch (ThreadDeath e) {
Log.info("Halted activity thread", "name", name);
return;
}
Log.info("Finished activity thread", "name", name);
}
protected void onError(Exception e) {
Log.error("Activity error!", "activity", name, "error", e);
}
protected abstract void loop();
}