br.com.objectos.way.upload.AbstractUploadScript Maven / Gradle / Ivy
/*
* Copyright 2013 Objectos, Fábrica de Software LTDA.
*
* 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 br.com.objectos.way.upload;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
/**
* @author [email protected] (Marcio Endo)
*/
abstract class AbstractUploadScript implements Runnable {
private final Object lock = new Object();
private final ExecutorService executor;
private final ConcurrentMap map;
private final HasKey async;
private Future future;
public AbstractUploadScript(ExecutorService executor,
ConcurrentMap map,
HasKey async) {
this.executor = executor;
this.map = map;
this.async = async;
}
public void sumit() {
if (future == null) {
synchronized (lock) {
if (future == null) {
future = executor.submit(this);
}
}
}
}
@Override
public void run() {
try {
onStart();
tryToCall();
onSuccess();
} catch (Exception e) {
onError(e);
} finally {
finish();
}
}
protected void onStart() {
}
protected void onSuccess() {
}
protected void onError(Exception e) {
}
protected void onFinish() {
}
void finish() {
Object key = async.getKey();
map.remove(key);
onFinish();
}
protected abstract void tryToCall() throws Exception;
}