dpcollins-google commented on a change in pull request #17125: URL: https://github.com/apache/beam/pull/17125#discussion_r831160357
########## File path: sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/pubsublite/internal/MemoryLimiterImpl.java ########## @@ -0,0 +1,79 @@ +/* + * 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 org.apache.beam.sdk.io.gcp.pubsublite.internal; + +import javax.annotation.concurrent.GuardedBy; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class MemoryLimiterImpl implements MemoryLimiter { + private static final Logger LOG = LoggerFactory.getLogger(MemoryLimiterImpl.class); + private final long minBlockSize; + + @GuardedBy("this") + private long available; + + public MemoryLimiterImpl(long minBlockSize, long maxAvailable) { + this.minBlockSize = minBlockSize; + this.available = maxAvailable; + } + + @Override + public synchronized Block claim(long toAcquire) { + toAcquire = Math.max(Math.min(toAcquire, available / 2), minBlockSize); + available -= toAcquire; + return new Block(toAcquire); + } + + @Override + public long getMinBlockSize() { + return minBlockSize; + } + + private synchronized void release(long toRelease) { + available += toRelease; + } + + public class Block implements MemoryLimiter.Block { + public final long claimed; + private boolean released = false; + + private Block(long claimed) { + this.claimed = claimed; + } + + @Override + public long claimed() { + return claimed; + } + + @Override + public void close() { + release(claimed); Review comment: Done. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
