/*
* Copyright (C) 2014 Indeed 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 com.indeed.imhotep.service;
import com.google.common.base.Throwables;
import com.google.common.collect.Lists;
import com.indeed.util.core.Throwables2;
import com.indeed.util.core.io.Closeables2;
import com.indeed.imhotep.AbstractImhotepMultiSession;
import com.indeed.imhotep.MemoryReservationContext;
import com.indeed.imhotep.api.ImhotepOutOfMemoryException;
import com.indeed.imhotep.local.ImhotepLocalSession;
import org.apache.log4j.Logger;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.atomic.AtomicLong;
/**
* @author jsgroth
*/
class MTImhotepMultiSession extends AbstractImhotepMultiSession {
private static final Logger log = Logger.getLogger(MTImhotepMultiSession.class);
private final MemoryReservationContext memory;
private final ExecutorService executor;
private final Object closeLock = new Object();
private boolean closed = false;
private final long memoryClaimed;
MTImhotepMultiSession(final ImhotepLocalSession[] sessions,
final MemoryReservationContext memory,
final ExecutorService executor,
final AtomicLong tempFileSizeBytesLeft) throws ImhotepOutOfMemoryException {
super(sessions, tempFileSizeBytesLeft);
this.memory = memory;
this.executor = executor;
memoryClaimed = 0;
if (!memory.claimMemory(memoryClaimed)) throw new ImhotepOutOfMemoryException();
}
@Override
protected void preClose() {
synchronized (closeLock) {
if (!closed) {
closed = true;
try {
super.preClose();
} finally {
memory.releaseMemory(memoryClaimed);
// don't want to shut down the executor since it is re-used
}
}
}
}
@Override
protected void postClose() {
if (memory.usedMemory() > 0) {
log.error("MTImhotepMultiSession is leaking! usedMemory = "+memory.usedMemory());
}
Closeables2.closeQuietly(memory, log);
}
@Override
protected <E, T> void execute(final T[] ret, E[] things, final ThrowingFunction<? super E, ? extends T> function) throws ExecutionException {
final List<Future<T>> futures = Lists.newArrayListWithCapacity(things.length);
for (final E thing : things) {
futures.add(executor.submit(new Callable<T>() {
@Override
public T call() throws Exception {
return function.apply(thing);
}
}));
}
Throwable t = null;
for (int i = 0; i < futures.size(); ++i) {
try {
ret[i] = futures.get(i).get();
} catch (Throwable t2) {
t = t2;
}
}
if (t != null) {
safeClose();
throw Throwables2.propagate(t, ExecutionException.class);
}
}
}