/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 gobblin.writer;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.ExecutionException;
import gobblin.annotation.Alpha;
/**
* A future object generated after a record was inserted into a batch
* We can include more meta data about this record in the future
*/
@Alpha
public final class RecordFuture implements Future<RecordMetadata>{
CountDownLatch latch;
long offset;
public RecordFuture (CountDownLatch latch, long offset) {
this.latch = latch;
this.offset = offset;
}
@Override
public boolean isDone() {
return this.latch.getCount() == 0L;
}
@Override
public boolean isCancelled() {
return false;
}
@Override
public boolean cancel(boolean interrupt) {
return false;
}
@Override
public RecordMetadata get() throws InterruptedException, ExecutionException {
this.latch.await();
return new RecordMetadata(this.offset);
}
@Override
public RecordMetadata get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
boolean occurred = this.latch.await(timeout, unit);
if (!occurred) {
throw new TimeoutException("Timeout after waiting for " + TimeUnit.MILLISECONDS.convert(timeout, unit));
}
return new RecordMetadata(this.offset);
}
}