Java ProcessorContext.valueSerde方法代码示例

import org.apache.kafka.streams.processor.ProcessorContext; //导入方法依赖的package包/类
@SuppressWarnings("unchecked")
private void initInternal(final ProcessorContext context) {
    this.context = (InternalProcessorContext) context;
    this.serdes = new StateSerdes<>(ProcessorStateManager.storeChangelogTopic(context.applicationId(), underlying.name()),
                                    keySerde == null ? (Serde<K>) context.keySerde() : keySerde,
                                    valueSerde == null ? (Serde<V>) context.valueSerde() : valueSerde);

    this.cacheName = context.taskId() + "-" + underlying.name();
    this.cache = this.context.getCache();
    cache.addDirtyEntryFlushListener(cacheName, new ThreadCache.DirtyEntryFlushListener() {
        @Override
        public void apply(final List<ThreadCache.DirtyEntry> entries) {
            for (ThreadCache.DirtyEntry entry : entries) {
                putAndMaybeForward(entry, (InternalProcessorContext) context);
            }
        }
    });
}
 

import org.apache.kafka.streams.processor.ProcessorContext; //导入方法依赖的package包/类
@Override
@SuppressWarnings("unchecked")
public void init(ProcessorContext context, StateStore root) {
    // construct the serde
    this.serdes = new StateSerdes<>(
        ProcessorStateManager.storeChangelogTopic(context.applicationId(), name),
        keySerde == null ? (Serde<K>) context.keySerde() : keySerde,
        valueSerde == null ? (Serde<V>) context.valueSerde() : valueSerde);

    if (root != null) {
        // register the store
        context.register(root, true, new StateRestoreCallback() {
            @Override
            public void restore(byte[] key, byte[] value) {
                // check value for null, to avoid  deserialization error.
                if (value == null) {
                    put(serdes.keyFrom(key), null);
                } else {
                    put(serdes.keyFrom(key), serdes.valueFrom(value));
                }
            }
        });
    }

    this.open = true;
}
 

import org.apache.kafka.streams.processor.ProcessorContext; //导入方法依赖的package包/类
@Override
@SuppressWarnings("unchecked")
public void init(ProcessorContext context, StateStore root) {
    inner.init(context, root);

    // construct the serde
    StateSerdes<K, V>  serdes = new StateSerdes<>(
        ProcessorStateManager.storeChangelogTopic(context.applicationId(), inner.name()),
        keySerde == null ? (Serde<K>) context.keySerde() : keySerde,
        valueSerde == null ? (Serde<V>) context.valueSerde() : valueSerde);

    this.changeLogger = new StoreChangeLogger<>(inner.name(), context, serdes);

    // if the inner store is an LRU cache, add the eviction listener to log removed record
    if (inner instanceof MemoryLRUCache) {
        ((MemoryLRUCache<K, V>) inner).whenEldestRemoved(new MemoryNavigableLRUCache.EldestEntryRemovalListener<K, V>() {
            @Override
            public void apply(K key, V value) {
                removed(key);
            }
        });
    }
}
 

import org.apache.kafka.streams.processor.ProcessorContext; //导入方法依赖的package包/类
@Override
public void init(ProcessorContext context) {
    this.context = context;
    if (keySerde == null) {
        this.keySerde = context.keySerde();
    }
    if (valueSerde == null) {
        this.valueSerde = context.valueSerde();
    }
}
 

import org.apache.kafka.streams.processor.ProcessorContext; //导入方法依赖的package包/类
@Override
@SuppressWarnings("unchecked")
public void init(final ProcessorContext context, final StateStore root) {
    this.context = context;
    // construct the serde
    serdes = new StateSerdes<>(ProcessorStateManager.storeChangelogTopic(context.applicationId(), bytesStore.name()),
                               keySerde == null ? (Serde<K>) context.keySerde() : keySerde,
                               valueSerde == null ? (Serde<V>) context.valueSerde() : valueSerde);

    bytesStore.init(context, root);
}
 

import org.apache.kafka.streams.processor.ProcessorContext; //导入方法依赖的package包/类
@Override
@SuppressWarnings("unchecked")
public void init(final ProcessorContext context, final StateStore root) {
    final String storeName = bytesStore.name();
    topic = ProcessorStateManager.storeChangelogTopic(context.applicationId(), storeName);

    serdes = new StateSerdes<>(
        topic,
        keySerde == null ? (Serde<K>) context.keySerde() : keySerde,
        aggSerde == null ? (Serde<AGG>) context.valueSerde() : aggSerde);

    bytesStore.init(context, root);
}
 

import org.apache.kafka.streams.processor.ProcessorContext; //导入方法依赖的package包/类
@SuppressWarnings("unchecked")
@Override
public void init(final ProcessorContext context, final StateStore root) {
    innerBytes.init(context, root);

    serdes = new StateSerdes<>(ProcessorStateManager.storeChangelogTopic(context.applicationId(), innerBytes.name()),
                               keySerde == null ? (Serde<K>) context.keySerde() : keySerde,
                               valueSerde == null ? (Serde<V>) context.valueSerde() : valueSerde);
}
 

import org.apache.kafka.streams.processor.ProcessorContext; //导入方法依赖的package包/类
@Override
@SuppressWarnings("unchecked")
public void init(ProcessorContext context, StateStore root) {
    // construct the serde
    this.serdes = new StateSerdes<>(
        ProcessorStateManager.storeChangelogTopic(context.applicationId(), name),
        keySerde == null ? (Serde<K>) context.keySerde() : keySerde,
        valueSerde == null ? (Serde<V>) context.valueSerde() : valueSerde);

    // register the store
    context.register(root, true, new StateRestoreCallback() {
        @Override
        public void restore(byte[] key, byte[] value) {
            restoring = true;
            // check value for null, to avoid  deserialization error.
            if (value == null) {
                put(serdes.keyFrom(key), null);
            } else {
                put(serdes.keyFrom(key), serdes.valueFrom(value));
            }
            restoring = false;
        }
    });
}
 

import org.apache.kafka.streams.processor.ProcessorContext; //导入方法依赖的package包/类
@SuppressWarnings("unchecked")
public void openDB(ProcessorContext context) {
    // initialize the default rocksdb options
    final BlockBasedTableConfig tableConfig = new BlockBasedTableConfig();
    tableConfig.setBlockCacheSize(BLOCK_CACHE_SIZE);
    tableConfig.setBlockSize(BLOCK_SIZE);

    options = new Options();
    options.setTableFormatConfig(tableConfig);
    options.setWriteBufferSize(WRITE_BUFFER_SIZE);
    options.setCompressionType(COMPRESSION_TYPE);
    options.setCompactionStyle(COMPACTION_STYLE);
    options.setMaxWriteBufferNumber(MAX_WRITE_BUFFERS);
    options.setCreateIfMissing(true);
    options.setErrorIfExists(false);
    options.setInfoLogLevel(InfoLogLevel.ERROR_LEVEL);
    // this is the recommended way to increase parallelism in RocksDb
    // note that the current implementation of setIncreaseParallelism affects the number
    // of compaction threads but not flush threads (the latter remains one). Also
    // the parallelism value needs to be at least two because of the code in
    // https://github.com/facebook/rocksdb/blob/62ad0a9b19f0be4cefa70b6b32876e764b7f3c11/util/options.cc#L580
    // subtracts one from the value passed to determine the number of compaction threads
    // (this could be a bug in the RocksDB code and their devs have been contacted).
    options.setIncreaseParallelism(Math.max(Runtime.getRuntime().availableProcessors(), 2));

    wOptions = new WriteOptions();
    wOptions.setDisableWAL(true);

    fOptions = new FlushOptions();
    fOptions.setWaitForFlush(true);

    final Map<String, Object> configs = context.appConfigs();
    final Object configSetterValue = configs.get(StreamsConfig.ROCKSDB_CONFIG_SETTER_CLASS_CONFIG);
    final Class<RocksDBConfigSetter> configSetterClass = (Class<RocksDBConfigSetter>) ConfigDef.parseType(
            StreamsConfig.ROCKSDB_CONFIG_SETTER_CLASS_CONFIG,
            configSetterValue,
            ConfigDef.Type.CLASS);

    if (configSetterClass != null) {
        final RocksDBConfigSetter configSetter = Utils.newInstance(configSetterClass);
        configSetter.setConfig(name, options, configs);
    }
    // we need to construct the serde while opening DB since
    // it is also triggered by windowed DB segments without initialization
    this.serdes = new StateSerdes<>(
        ProcessorStateManager.storeChangelogTopic(context.applicationId(), name),
        keySerde == null ? (Serde<K>) context.keySerde() : keySerde,
        valueSerde == null ? (Serde<V>) context.valueSerde() : valueSerde);

    this.dbDir = new File(new File(context.stateDir(), parentDir), this.name);
    try {
        this.db = openDB(this.dbDir, this.options, TTL_SECONDS);
    } catch (IOException e) {
        throw new StreamsException(e);
    }
}