| /** |
| * 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.serialization.Serde; |
| import org.apache.kafka.streams.errors.TopologyBuilderException; |
| import org.apache.kafka.streams.StreamsConfig; |
| import org.apache.kafka.streams.StreamsMetrics; |
| import org.apache.kafka.streams.processor.ProcessorContext; |
| import org.apache.kafka.streams.processor.StateStore; |
| import org.apache.kafka.streams.processor.StateRestoreCallback; |
| import org.apache.kafka.streams.processor.TaskId; |
| |
| import java.io.File; |
| |
| public class ProcessorContextImpl implements ProcessorContext, RecordCollector.Supplier { |
| |
| public static final String NONEXIST_TOPIC = "__null_topic__"; |
| |
| private final TaskId id; |
| private final StreamTask task; |
| private final StreamsMetrics metrics; |
| private final RecordCollector collector; |
| private final ProcessorStateManager stateMgr; |
| |
| private final Serde<?> keySerde; |
| private final Serde<?> valSerde; |
| |
| private boolean initialized; |
| |
| @SuppressWarnings("unchecked") |
| public ProcessorContextImpl(TaskId id, |
| StreamTask task, |
| StreamsConfig config, |
| RecordCollector collector, |
| ProcessorStateManager stateMgr, |
| StreamsMetrics metrics) { |
| this.id = id; |
| this.task = task; |
| this.metrics = metrics; |
| this.collector = collector; |
| this.stateMgr = stateMgr; |
| |
| this.keySerde = config.keySerde(); |
| this.valSerde = config.valueSerde(); |
| |
| this.initialized = false; |
| } |
| |
| public void initialized() { |
| this.initialized = true; |
| } |
| |
| public ProcessorStateManager getStateMgr() { |
| return stateMgr; |
| } |
| |
| @Override |
| public TaskId taskId() { |
| return id; |
| } |
| |
| @Override |
| public String applicationId() { |
| return task.applicationId(); |
| } |
| |
| @Override |
| public RecordCollector recordCollector() { |
| return this.collector; |
| } |
| |
| @Override |
| public Serde<?> keySerde() { |
| return this.keySerde; |
| } |
| |
| @Override |
| public Serde<?> valueSerde() { |
| return this.valSerde; |
| } |
| |
| @Override |
| public File stateDir() { |
| return stateMgr.baseDir(); |
| } |
| |
| @Override |
| public StreamsMetrics metrics() { |
| return metrics; |
| } |
| |
| @Override |
| public void register(StateStore store, boolean loggingEnabled, StateRestoreCallback stateRestoreCallback) { |
| if (initialized) |
| throw new IllegalStateException("Can only create state stores during initialization."); |
| |
| stateMgr.register(store, loggingEnabled, stateRestoreCallback); |
| } |
| |
| @Override |
| public StateStore getStateStore(String name) { |
| ProcessorNode node = task.node(); |
| |
| if (node == null) |
| throw new TopologyBuilderException("Accessing from an unknown node"); |
| |
| // TODO: restore this once we fix the ValueGetter initialization issue |
| //if (!node.stateStores.contains(name)) |
| // throw new TopologyBuilderException("Processor " + node.name() + " has no access to StateStore " + name); |
| |
| return stateMgr.getStore(name); |
| } |
| |
| @Override |
| public String topic() { |
| if (task.record() == null) |
| throw new IllegalStateException("This should not happen as topic() should only be called while a record is processed"); |
| |
| String topic = task.record().topic(); |
| |
| if (topic.equals(NONEXIST_TOPIC)) |
| return null; |
| else |
| return topic; |
| } |
| |
| @Override |
| public int partition() { |
| if (task.record() == null) |
| throw new IllegalStateException("This should not happen as partition() should only be called while a record is processed"); |
| |
| return task.record().partition(); |
| } |
| |
| @Override |
| public long offset() { |
| if (this.task.record() == null) |
| throw new IllegalStateException("This should not happen as offset() should only be called while a record is processed"); |
| |
| return this.task.record().offset(); |
| } |
| |
| @Override |
| public long timestamp() { |
| if (task.record() == null) |
| throw new IllegalStateException("This should not happen as timestamp() should only be called while a record is processed"); |
| |
| return task.record().timestamp; |
| } |
| |
| @Override |
| public <K, V> void forward(K key, V value) { |
| task.forward(key, value); |
| } |
| |
| @Override |
| public <K, V> void forward(K key, V value, int childIndex) { |
| task.forward(key, value, childIndex); |
| } |
| |
| @Override |
| public <K, V> void forward(K key, V value, String childName) { |
| task.forward(key, value, childName); |
| } |
| |
| @Override |
| public void commit() { |
| task.needCommit(); |
| } |
| |
| @Override |
| public void schedule(long interval) { |
| task.schedule(interval); |
| } |
| } |