kafka InMemorySessionBytesStoreSupplier 源码
kafka InMemorySessionBytesStoreSupplier 代码
文件路径：/streams/src/main/java/org/apache/kafka/streams/state/internals/InMemorySessionBytesStoreSupplier.java
/*
* 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.kafka.streams.state.internals;
import org.apache.kafka.common.utils.Bytes;
import org.apache.kafka.streams.state.SessionBytesStoreSupplier;
import org.apache.kafka.streams.state.SessionStore;
public class InMemorySessionBytesStoreSupplier implements SessionBytesStoreSupplier {
private final String name;
private final long retentionPeriod;
public InMemorySessionBytesStoreSupplier(final String name,
final long retentionPeriod) {
this.name = name;
this.retentionPeriod = retentionPeriod;
}
@Override
public String name() {
return name;
}
@Override
public SessionStore<Bytes, byte[]> get() {
return new InMemorySessionStore(name, retentionPeriod, metricsScope());
}
@Override
public String metricsScope() {
return "in-memory-session";
}
// In-memory store is not *really* segmented, so just say it is 1 (for ordering consistency with caching enabled)
@Override
public long segmentIntervalMs() {
return 1;
}
@Override
public long retentionPeriod() {
return retentionPeriod;
}
}
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