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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.TopicPartition;
import org.apache.kafka.common.metrics.Sensor;
import org.apache.kafka.common.utils.LogContext;
import org.apache.kafka.streams.StreamsConfig;
import org.apache.kafka.streams.processor.TaskId;
import org.apache.kafka.streams.processor.internals.metrics.StreamsMetricsImpl;
import org.apache.kafka.streams.processor.internals.metrics.ThreadMetrics;
import org.apache.kafka.streams.state.internals.ThreadCache;
import org.slf4j.Logger;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Set;
import static org.apache.kafka.streams.internals.StreamsConfigUtils.eosEnabled;
class StandbyTaskCreator {
private final TopologyMetadata topologyMetadata;
private final StreamsConfig applicationConfig;
private final StreamsMetricsImpl streamsMetrics;
private final StateDirectory stateDirectory;
private final ChangelogReader storeChangelogReader;
private final ThreadCache dummyCache;
private final Logger log;
private final Sensor createTaskSensor;
private final boolean stateUpdaterEnabled;
StandbyTaskCreator(final TopologyMetadata topologyMetadata,
final StreamsConfig applicationConfig,
final StreamsMetricsImpl streamsMetrics,
final StateDirectory stateDirectory,
final ChangelogReader storeChangelogReader,
final String threadId,
final Logger log,
final boolean stateUpdaterEnabled) {
this.topologyMetadata = topologyMetadata;
this.applicationConfig = applicationConfig;
this.streamsMetrics = streamsMetrics;
this.stateDirectory = stateDirectory;
this.storeChangelogReader = storeChangelogReader;
this.log = log;
this.stateUpdaterEnabled = stateUpdaterEnabled;
createTaskSensor = ThreadMetrics.createTaskSensor(threadId, streamsMetrics);
dummyCache = new ThreadCache(
new LogContext(String.format("stream-thread [%s] ", Thread.currentThread().getName())),
0,
streamsMetrics
);
}
// TODO: convert to StandbyTask when we remove TaskManager#StateMachineTask with mocks
Collection createTasks(final Map> tasksToBeCreated) {
final List createdTasks = new ArrayList<>();
for (final Map.Entry> newTaskAndPartitions : tasksToBeCreated.entrySet()) {
final TaskId taskId = newTaskAndPartitions.getKey();
final Set partitions = newTaskAndPartitions.getValue();
final ProcessorTopology topology = topologyMetadata.buildSubtopology(taskId);
if (topology.hasStateWithChangelogs()) {
final ProcessorStateManager stateManager = new ProcessorStateManager(
taskId,
Task.TaskType.STANDBY,
eosEnabled(applicationConfig),
getLogContext(taskId),
stateDirectory,
storeChangelogReader,
topology.storeToChangelogTopic(),
partitions,
stateUpdaterEnabled);
final InternalProcessorContext