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/*
* Copyright (c) 2008-2018, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.jet.impl.processor;
import com.hazelcast.instance.HazelcastInstanceImpl;
import com.hazelcast.jet.core.Inbox;
import com.hazelcast.jet.core.Outbox;
import com.hazelcast.jet.core.Processor;
import com.hazelcast.jet.core.Watermark;
import com.hazelcast.jet.function.DistributedFunction;
import com.hazelcast.jet.impl.execution.init.Contexts.ProcCtx;
import com.hazelcast.logging.ILogger;
import com.hazelcast.spi.NodeEngine;
import javax.annotation.Nonnull;
import java.util.BitSet;
import java.util.function.Predicate;
import java.util.stream.IntStream;
import static com.hazelcast.jet.Util.entry;
import static com.hazelcast.jet.impl.execution.init.ExecutionPlan.createLoggerName;
/**
* Internal API, see
* {@link com.hazelcast.jet.core.processor.DiagnosticProcessors}.
*/
public final class PeekWrappedP extends ProcessorWrapper {
private final DistributedFunction toStringFn;
private final Predicate shouldLogFn;
private final LoggingInbox loggingInbox;
private ILogger logger;
private final boolean peekInput;
private final boolean peekOutput;
private final boolean peekSnapshot;
private boolean peekedWatermarkLogged;
public PeekWrappedP(
@Nonnull Processor wrapped,
@Nonnull DistributedFunction toStringFn,
@Nonnull Predicate shouldLogFn,
boolean peekInput, boolean peekOutput, boolean peekSnapshot
) {
super(wrapped);
this.toStringFn = toStringFn;
this.shouldLogFn = shouldLogFn;
this.peekInput = peekInput;
this.peekOutput = peekOutput;
this.peekSnapshot = peekSnapshot;
loggingInbox = peekInput ? new LoggingInbox() : null;
}
@Override
public void init(@Nonnull Outbox outbox, @Nonnull Context context) {
logger = context.logger();
outbox = new LoggingOutbox(outbox, peekOutput, peekSnapshot);
// Fix issue #595: pass a logger with real class name to processor
// We do this only if context is ProcCtx (that is, not for tests where TestProcessorContext can be used
// and also other objects could be mocked or null, such as jetInstance())
if (context instanceof ProcCtx) {
ProcCtx c = (ProcCtx) context;
NodeEngine nodeEngine = ((HazelcastInstanceImpl) c.jetInstance().getHazelcastInstance()).node.nodeEngine;
ILogger newLogger = nodeEngine.getLogger(
createLoggerName(wrapped.getClass().getName(), c.vertexName(), c.globalProcessorIndex()));
context = new ProcCtx(c.jetInstance(), c.getSerializationService(), newLogger, c.vertexName(),
c.globalProcessorIndex(), c.processingGuarantee(), c.localParallelism(), c.totalParallelism(),
c.memberIndex(), c.memberCount());
}
super.init(outbox, context);
}
@Override
public void process(int ordinal, @Nonnull Inbox inbox) {
if (peekInput) {
loggingInbox.wrappedInbox = inbox;
loggingInbox.ordinal = ordinal;
super.process(ordinal, loggingInbox);
} else {
super.process(ordinal, inbox);
}
}
private void log(String prefix, T object) {
// null object can come from poll()
if (object != null && shouldLogFn.test(object)) {
logger.info(prefix + ": " + toStringFn.apply(object));
}
}
@Override
public boolean tryProcessWatermark(@Nonnull Watermark watermark) {
if (peekInput && !peekedWatermarkLogged) {
logger.info("Input: " + watermark);
peekedWatermarkLogged = true;
}
if (super.tryProcessWatermark(watermark)) {
peekedWatermarkLogged = false;
if (peekOutput) {
logger.info("Output forwarded: " + watermark);
}
return true;
}
return false;
}
private class LoggingInbox implements Inbox {
private Inbox wrappedInbox;
private boolean peekedItemLogged;
private int ordinal;
@Override
public boolean isEmpty() {
return wrappedInbox.isEmpty();
}
@Override
public Object peek() {
T res = (T) wrappedInbox.peek();
if (!peekedItemLogged && res != null) {
log(res);
peekedItemLogged = true;
}
return res;
}
@Override
public Object poll() {
T res = (T) wrappedInbox.poll();
if (!peekedItemLogged && res != null) {
log(res);
}
peekedItemLogged = false;
return res;
}
private void log(T res) {
PeekWrappedP.this.log("Input from ordinal " + ordinal, res);
}
@Override
public void remove() {
peekedItemLogged = false;
wrappedInbox.remove();
}
}
private final class LoggingOutbox implements Outbox {
private final Outbox wrappedOutbox;
private final int[] all;
private final boolean logOutput;
private final boolean logSnapshot;
private final BitSet broadcastTracker;
private LoggingOutbox(Outbox wrappedOutbox, boolean logOutput, boolean logSnapshot) {
this.wrappedOutbox = wrappedOutbox;
this.broadcastTracker = new BitSet(wrappedOutbox.bucketCount());
this.all = IntStream.range(0, wrappedOutbox.bucketCount()).toArray();
this.logOutput = logOutput;
this.logSnapshot = logSnapshot;
}
@Override
public int bucketCount() {
return wrappedOutbox.bucketCount();
}
@Override
public boolean offer(int ordinal, @Nonnull Object item) {
if (ordinal == -1) {
return offer(all, item);
}
if (!wrappedOutbox.offer(ordinal, item)) {
return false;
}
if (logOutput) {
String prefix = "Output to ordinal " + ordinal;
if (item instanceof Watermark) {
logger.info(prefix + ": " + item);
} else {
log(prefix, (T) item);
}
}
return true;
}
@Override
public boolean offer(int[] ordinals, @Nonnull Object item) {
// use broadcast logic to be able to report accurately
// which queue was pushed to when.
for (int i = 0; i < ordinals.length; i++) {
if (broadcastTracker.get(i)) {
continue;
}
if (offer(i, item)) {
broadcastTracker.set(i);
} else {
return false;
}
}
broadcastTracker.clear();
return true;
}
@Override
public boolean offerToSnapshot(@Nonnull Object key, @Nonnull Object value) {
if (!wrappedOutbox.offerToSnapshot(key, value)) {
return false;
}
if (logSnapshot) {
log("Output to snapshot", (T) entry(key, value));
}
return true;
}
}
}
