com.hazelcast.spi.impl.sequence.FailFastCallIdSequence Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2020, Hazelcast, Inc. All Rights Reserved.
*
* 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.hazelcast.spi.impl.sequence;
import com.hazelcast.core.HazelcastOverloadException;
import com.hazelcast.internal.util.ConcurrencyDetection;
/**
* A {@link CallIdSequence} that provides backpressure by taking
* the number of in-flight operations into account when before creating a new call-id.
*
* It is possible to temporarily create more concurrent invocations than the declared capacity due to:
*
* - system operations
* - the racy nature of checking if space is available and getting the next sequence.
*
* The latter cause is not a problem since the capacity is exceeded temporarily and it isn't sustainable.
* So perhaps there are a few threads that at the same time see that the there is space and do a next.
*/
public class FailFastCallIdSequence extends AbstractCallIdSequence {
public FailFastCallIdSequence(int maxConcurrentInvocations, ConcurrencyDetection concurrencyDetection) {
super(maxConcurrentInvocations, concurrencyDetection);
}
@Override
protected void handleNoSpaceLeft() {
throw new HazelcastOverloadException(
"Maximum invocation count is reached. maxConcurrentInvocations = " + getMaxConcurrentInvocations());
}
}