org.apache.kafka.streams.kstream.internals.KTableSourceValueGetterSupplier Maven / Gradle / Ivy
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* 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,
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* See the License for the specific language governing permissions and
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package org.apache.kafka.streams.kstream.internals;
import org.apache.kafka.streams.processor.ProcessorContext;
import org.apache.kafka.streams.state.TimestampedKeyValueStore;
import org.apache.kafka.streams.state.ValueAndTimestamp;
public class KTableSourceValueGetterSupplier implements KTableValueGetterSupplier {
private final String storeName;
public KTableSourceValueGetterSupplier(final String storeName) {
this.storeName = storeName;
}
public KTableValueGetter get() {
return new KTableSourceValueGetter();
}
@Override
public String[] storeNames() {
return new String[]{storeName};
}
private class KTableSourceValueGetter implements KTableValueGetter {
private TimestampedKeyValueStore store = null;
@SuppressWarnings("unchecked")
public void init(final ProcessorContext context) {
store = (TimestampedKeyValueStore) context.getStateStore(storeName);
}
public ValueAndTimestamp get(final K key) {
return store.get(key);
}
}
}