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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,
* 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.processor.internals;
import org.apache.kafka.common.utils.Bytes;
import org.apache.kafka.streams.StreamsConfig;
import org.apache.kafka.streams.processor.Cancellable;
import org.apache.kafka.streams.processor.PunctuationType;
import org.apache.kafka.streams.processor.Punctuator;
import org.apache.kafka.streams.processor.StateStore;
import org.apache.kafka.streams.processor.TaskId;
import org.apache.kafka.streams.processor.To;
import org.apache.kafka.streams.processor.api.Record;
import org.apache.kafka.streams.processor.internals.metrics.StreamsMetricsImpl;
import org.apache.kafka.streams.state.internals.ThreadCache;
import org.apache.kafka.streams.state.internals.ThreadCache.DirtyEntryFlushListener;
import java.time.Duration;
import static org.apache.kafka.streams.processor.internals.AbstractReadWriteDecorator.getReadWriteStore;
public class GlobalProcessorContextImpl extends AbstractProcessorContext {
private final GlobalStateManager stateManager;
public GlobalProcessorContextImpl(final StreamsConfig config,
final GlobalStateManager stateMgr,
final StreamsMetricsImpl metrics,
final ThreadCache cache) {
super(new TaskId(-1, -1), config, metrics, cache);
stateManager = stateMgr;
}
@Override
protected StateManager stateManager() {
return stateManager;
}
@SuppressWarnings("unchecked")
@Override
public S getStateStore(final String name) {
final StateStore store = stateManager.getGlobalStore(name);
return (S) getReadWriteStore(store);
}
@SuppressWarnings("unchecked")
@Override
public void forward(final Record record) {
final ProcessorNode previousNode = currentNode();
try {
for (final ProcessorNode child : currentNode().children()) {
setCurrentNode(child);
((ProcessorNode) child).process(record);
}
} finally {
setCurrentNode(previousNode);
}
}
@Override
public void forward(final Record record, final String childName) {
throw new UnsupportedOperationException("this should not happen: forward() not supported in global processor context.");
}
@SuppressWarnings("unchecked")
@Override
public void forward(final KIn key, final VIn value) {
forward(new Record<>(key, value, timestamp(), headers()));
}
/**
* No-op. This should only be called on GlobalStateStore#flush and there should be no child nodes
*/
@Override
public void forward(final K key, final V value, final To to) {
if (!currentNode().children().isEmpty()) {
throw new IllegalStateException("This method should only be called on 'GlobalStateStore.flush' that should not have any children.");
}
}
/**
* @throws UnsupportedOperationException on every invocation
*/
@Override
@Deprecated
public void forward(final K key, final V value, final int childIndex) {
throw new UnsupportedOperationException("this should not happen: forward() not supported in global processor context.");
}
/**
* @throws UnsupportedOperationException on every invocation
*/
@Override
@Deprecated
public void forward(final K key, final V value, final String childName) {
throw new UnsupportedOperationException("this should not happen: forward() not supported in global processor context.");
}
@Override
public void commit() {
//no-op
}
/**
* @throws UnsupportedOperationException on every invocation
*/
@Override
@Deprecated
public Cancellable schedule(final long interval, final PunctuationType type, final Punctuator callback) {
throw new UnsupportedOperationException("this should not happen: schedule() not supported in global processor context.");
}
/**
* @throws UnsupportedOperationException on every invocation
*/
@Override
public Cancellable schedule(final Duration interval, final PunctuationType type, final Punctuator callback) {
throw new UnsupportedOperationException("this should not happen: schedule() not supported in global processor context.");
}
@Override
public void logChange(final String storeName,
final Bytes key,
final byte[] value,
final long timestamp) {
throw new UnsupportedOperationException("this should not happen: logChange() not supported in global processor context.");
}
@Override
public void transitionToActive(final StreamTask streamTask, final RecordCollector recordCollector, final ThreadCache newCache) {
throw new UnsupportedOperationException("this should not happen: transitionToActive() not supported in global processor context.");
}
@Override
public void transitionToStandby(final ThreadCache newCache) {
throw new UnsupportedOperationException("this should not happen: transitionToStandby() not supported in global processor context.");
}
@Override
public void registerCacheFlushListener(final String namespace, final DirtyEntryFlushListener listener) {
cache.addDirtyEntryFlushListener(namespace, listener);
}
}
