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RosMessagesTransportEventMatching.java
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RosMessagesTransportEventMatching.java
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/**********************************************************************
* Copyright (c) 2019 École Polytechnique de Montréal
*
* All rights reserved. This program and the accompanying materials are
* made available under the terms of the Eclipse Public License 2.0 which
* accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
**********************************************************************/
package org.eclipse.tracecompass.incubator.internal.ros.core.analysis.model.messagestransport;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.WeakHashMap;
import org.eclipse.jdt.annotation.NonNull;
import org.eclipse.tracecompass.analysis.os.linux.core.trace.IKernelAnalysisEventLayout;
import org.eclipse.tracecompass.analysis.os.linux.core.trace.IKernelTrace;
import org.eclipse.tracecompass.incubator.internal.ros.core.analysis.model.connections.ConnectionEndpoint;
import org.eclipse.tracecompass.internal.lttng2.kernel.core.TcpEventStrings;
import org.eclipse.tracecompass.internal.lttng2.kernel.core.event.matching.TcpLttngEventMatching;
import org.eclipse.tracecompass.tmf.core.event.ITmfEvent;
import org.eclipse.tracecompass.tmf.core.event.TmfEventField;
import org.eclipse.tracecompass.tmf.core.event.matching.IEventMatchingKey;
import org.eclipse.tracecompass.tmf.core.trace.ITmfTrace;
import org.eclipse.tracecompass.tmf.core.trace.ITmfTraceWithPreDefinedEvents;
import org.eclipse.tracecompass.tmf.core.trace.TmfEventTypeCollectionHelper;
import org.eclipse.tracecompass.tmf.ctf.core.event.CtfTmfEventField;
/**
* Class to match TCP events with useful ROS connection context
*
* FIXME code duplication with TcpLttngEventMatching
*
* @author Christophe Bedard
*/
public class RosMessagesTransportEventMatching extends TcpLttngEventMatching {
// FIXME get base path from layout instead
private static final @NonNull String[] FIELD_PATH_TO_SADDR = { "network_header", CtfTmfEventField.FIELD_VARIANT_SELECTED, TcpEventStrings.SADDR }; //$NON-NLS-1$
private static final @NonNull String[] FIELD_PATH_TO_DADDR = { "network_header", CtfTmfEventField.FIELD_VARIANT_SELECTED, TcpEventStrings.DADDR }; //$NON-NLS-1$
private static final @NonNull String[] FIELD_PATH_TO_SOURCE_PORT = { "network_header", CtfTmfEventField.FIELD_VARIANT_SELECTED, "transport_header", "tcp", "source_port" }; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
private static final @NonNull String[] FIELD_PATH_TO_DEST_PORT = { "network_header", CtfTmfEventField.FIELD_VARIANT_SELECTED, "transport_header", "tcp", "dest_port" }; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
private static final Map<IKernelAnalysisEventLayout, Set<String>> REQUIRED_EVENTS = new HashMap<>();
/** Use a weak hash map so that traces can be garbage collected */
private static final Map<ITmfTrace, IKernelAnalysisEventLayout> TRACE_LAYOUTS = new WeakHashMap<>();
@Override
public boolean canMatchTrace(ITmfTrace trace) {
// Get the events that this trace needs to have
if (!(trace instanceof IKernelTrace)) {
// Not a kernel trace, we cannot know what events to use, return
// false
return false;
}
IKernelAnalysisEventLayout layout = ((IKernelTrace) trace).getKernelEventLayout();
TRACE_LAYOUTS.put(trace, layout);
Set<String> events = REQUIRED_EVENTS.get(layout);
if (events == null) {
events = new HashSet<>();
events.addAll(layout.eventsNetworkSend());
events.addAll(layout.eventsNetworkReceive());
REQUIRED_EVENTS.put(layout, events);
}
if (!(trace instanceof ITmfTraceWithPreDefinedEvents)) {
// No predefined events, suppose events are present
return true;
}
ITmfTraceWithPreDefinedEvents ktrace = (ITmfTraceWithPreDefinedEvents) trace;
Set<String> traceEvents = TmfEventTypeCollectionHelper.getEventNames(ktrace.getContainedEventTypes());
traceEvents.retainAll(events);
return !traceEvents.isEmpty();
}
@Override
public IEventMatchingKey getEventKey(ITmfEvent event) {
IKernelAnalysisEventLayout layout = TRACE_LAYOUTS.get(event.getTrace());
if (layout == null) {
return null;
}
TmfEventField content = (TmfEventField) event.getContent();
Long sequence = content.getFieldValue(Long.class, layout.fieldPathTcpSeq());
Long ack = content.getFieldValue(Long.class, layout.fieldPathTcpAckSeq());
Long flags = content.getFieldValue(Long.class, layout.fieldPathTcpFlags());
long[] saddr = content.getFieldValue(long[].class, FIELD_PATH_TO_SADDR);
Long sport = content.getFieldValue(Long.class, FIELD_PATH_TO_SOURCE_PORT);
long[] daddr = content.getFieldValue(long[].class, FIELD_PATH_TO_DADDR);
Long dport = content.getFieldValue(Long.class, FIELD_PATH_TO_DEST_PORT);
if (sequence == null || ack == null || flags == null || saddr == null || sport == null || daddr == null || dport == null) {
return null;
}
ConnectionEndpoint sourceEndpoint = new ConnectionEndpoint(saddr, sport);
ConnectionEndpoint destinationEndpoint = new ConnectionEndpoint(daddr, dport);
NetworkConnection connection = new NetworkConnection(sourceEndpoint, destinationEndpoint);
return new RosMessagesTransportEventKey(sequence, ack, flags, connection);
}
}