Examples with ProcessorNode org.apache.kafka.streams.processor.internals.ProcessorNode used on opensource projects

Example 1 with ProcessorNode

use of org.apache.kafka.streams.processor.internals.ProcessorNode in project kafka by apache.

the class TopologyBuilder method build.

private ProcessorTopology build(Set<String> nodeGroup) {
    List<ProcessorNode> processorNodes = new ArrayList<>(nodeFactories.size());
    Map<String, ProcessorNode> processorMap = new HashMap<>();
    Map<String, SourceNode> topicSourceMap = new HashMap<>();
    Map<String, SinkNode> topicSinkMap = new HashMap<>();
    Map<String, StateStore> stateStoreMap = new LinkedHashMap<>();
    // create processor nodes in a topological order ("nodeFactories" is already topologically sorted)
    for (NodeFactory factory : nodeFactories.values()) {
        if (nodeGroup == null || nodeGroup.contains(factory.name)) {
            final ProcessorNode node = factory.build();
            processorNodes.add(node);
            processorMap.put(node.name(), node);
            if (factory instanceof ProcessorNodeFactory) {
                for (String parent : ((ProcessorNodeFactory) factory).parents) {
                    ProcessorNode<?, ?> parentNode = processorMap.get(parent);
                    parentNode.addChild(node);
                }
                for (String stateStoreName : ((ProcessorNodeFactory) factory).stateStoreNames) {
                    if (!stateStoreMap.containsKey(stateStoreName)) {
                        StateStore stateStore;
                        if (stateFactories.containsKey(stateStoreName)) {
                            final StateStoreSupplier supplier = stateFactories.get(stateStoreName).supplier;
                            stateStore = supplier.get();
                            // remember the changelog topic if this state store is change-logging enabled
                            if (supplier.loggingEnabled() && !storeToChangelogTopic.containsKey(stateStoreName)) {
                                final String changelogTopic = ProcessorStateManager.storeChangelogTopic(this.applicationId, stateStoreName);
                                storeToChangelogTopic.put(stateStoreName, changelogTopic);
                            }
                        } else {
                            stateStore = globalStateStores.get(stateStoreName);
                        }
                        stateStoreMap.put(stateStoreName, stateStore);
                    }
                }
            } else if (factory instanceof SourceNodeFactory) {
                final SourceNodeFactory sourceNodeFactory = (SourceNodeFactory) factory;
                final List<String> topics = (sourceNodeFactory.pattern != null) ? sourceNodeFactory.getTopics(subscriptionUpdates.getUpdates()) : sourceNodeFactory.topics;
                for (String topic : topics) {
                    if (internalTopicNames.contains(topic)) {
                        // prefix the internal topic name with the application id
                        topicSourceMap.put(decorateTopic(topic), (SourceNode) node);
                    } else {
                        topicSourceMap.put(topic, (SourceNode) node);
                    }
                }
            } else if (factory instanceof SinkNodeFactory) {
                final SinkNodeFactory sinkNodeFactory = (SinkNodeFactory) factory;
                for (String parent : sinkNodeFactory.parents) {
                    processorMap.get(parent).addChild(node);
                    if (internalTopicNames.contains(sinkNodeFactory.topic)) {
                        // prefix the internal topic name with the application id
                        topicSinkMap.put(decorateTopic(sinkNodeFactory.topic), (SinkNode) node);
                    } else {
                        topicSinkMap.put(sinkNodeFactory.topic, (SinkNode) node);
                    }
                }
            } else {
                throw new TopologyBuilderException("Unknown definition class: " + factory.getClass().getName());
            }
        }
    }
    return new ProcessorTopology(processorNodes, topicSourceMap, topicSinkMap, new ArrayList<>(stateStoreMap.values()), storeToChangelogTopic, new ArrayList<>(globalStateStores.values()));
}

Example 2 with ProcessorNode

use of org.apache.kafka.streams.processor.internals.ProcessorNode in project kafka by apache.

the class ForwardingCacheFlushListener method apply.

@Override
public void apply(final K key, final V newValue, final V oldValue) {
    final ProcessorNode prev = context.currentNode();
    context.setCurrentNode(myNode);
    try {
        if (sendOldValues) {
            context.forward(key, new Change<>(newValue, oldValue));
        } else {
            context.forward(key, new Change<>(newValue, null));
        }
    } finally {
        context.setCurrentNode(prev);
    }
}

Example 3 with ProcessorNode

use of org.apache.kafka.streams.processor.internals.ProcessorNode in project kafka by apache.

the class KStreamTestDriver method process.

public void process(String topicName, Object key, Object value) {
    final ProcessorNode prevNode = context.currentNode();
    ProcessorNode currNode = topology.source(topicName);
    if (currNode == null && globalTopology != null) {
        currNode = globalTopology.source(topicName);
    }
    // if yes, skip
    if (topicName.endsWith(ProcessorStateManager.STATE_CHANGELOG_TOPIC_SUFFIX)) {
        return;
    }
    context.setRecordContext(createRecordContext(context.timestamp()));
    context.setCurrentNode(currNode);
    try {
        context.forward(key, value);
    } finally {
        context.setCurrentNode(prevNode);
    }
}

Example 4 with ProcessorNode

use of org.apache.kafka.streams.processor.internals.ProcessorNode in project kafka by apache.

the class KStreamTestDriver method allProcessorNames.

public Set<String> allProcessorNames() {
    Set<String> names = new HashSet<>();
    List<ProcessorNode> nodes = topology.processors();
    for (ProcessorNode node : nodes) {
        names.add(node.name());
    }
    return names;
}

Example 5 with ProcessorNode

use of org.apache.kafka.streams.processor.internals.ProcessorNode in project kafka by apache.

the class KStreamTestDriver method punctuate.

public void punctuate(long timestamp) {
    final ProcessorNode prevNode = context.currentNode();
    for (ProcessorNode processor : topology.processors()) {
        if (processor.processor() != null) {
            context.setRecordContext(createRecordContext(timestamp));
            context.setCurrentNode(processor);
            try {
                processor.processor().punctuate(timestamp);
            } finally {
                context.setCurrentNode(prevNode);
            }
        }
    }
}