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Add instrumentation in InboundHandler
Signed-off-by: Gagan Juneja <[email protected]>
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Gagan Juneja
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Sep 20, 2023
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120 changes: 120 additions & 0 deletions
120
server/src/main/java/org/opensearch/telemetry/tracing/channels/TraceableTcpChannel.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,120 @@ | ||
| /* | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| * | ||
| * The OpenSearch Contributors require contributions made to | ||
| * this file be licensed under the Apache-2.0 license or a | ||
| * compatible open source license. | ||
| */ | ||
|
|
||
| package org.opensearch.telemetry.tracing.channels; | ||
|
|
||
| import org.opensearch.common.util.FeatureFlags; | ||
| import org.opensearch.core.action.ActionListener; | ||
| import org.opensearch.core.common.bytes.BytesReference; | ||
| import org.opensearch.telemetry.tracing.Span; | ||
| import org.opensearch.telemetry.tracing.SpanScope; | ||
| import org.opensearch.telemetry.tracing.Tracer; | ||
| import org.opensearch.telemetry.tracing.listener.TraceableActionListener; | ||
| import org.opensearch.transport.TcpChannel; | ||
|
|
||
| import java.net.InetSocketAddress; | ||
|
|
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| /** | ||
| * Tracer wrapped {@link TcpChannel} | ||
| */ | ||
| public class TraceableTcpChannel implements TcpChannel { | ||
|
|
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| private final TcpChannel delegate; | ||
| private final Span span; | ||
| private final Tracer tracer; | ||
|
|
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| private final static ActionListener<Void> DUMMY_ACTION_LISTENER = ActionListener.wrap(() -> {}); | ||
|
|
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| /** | ||
| * Constructor. | ||
| * @param delegate delegate | ||
| * @param span span | ||
| * @param tracer tracer | ||
| */ | ||
| public TraceableTcpChannel(TcpChannel delegate, Span span, Tracer tracer) { | ||
| this.delegate = delegate; | ||
| this.span = span; | ||
| this.tracer = tracer; | ||
| } | ||
|
|
||
| /** | ||
| * Factory method. | ||
| * | ||
| * @param delegate delegate | ||
| * @param span span | ||
| * @param tracer tracer | ||
| * @return tcp channel | ||
| */ | ||
| public static TcpChannel create(TcpChannel delegate, final Span span, final Tracer tracer) { | ||
| if (FeatureFlags.isEnabled(FeatureFlags.TELEMETRY) == true) { | ||
| TraceableTcpChannel traceableTcpChannel = new TraceableTcpChannel(delegate, span, tracer); | ||
| traceableTcpChannel.addCloseListener(TraceableActionListener.create(DUMMY_ACTION_LISTENER, span, tracer)); | ||
| return traceableTcpChannel; | ||
| } else { | ||
| return delegate; | ||
| } | ||
| } | ||
|
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| @Override | ||
| public void close() { | ||
| try (SpanScope scope = tracer.withSpanInScope(span)) { | ||
| delegate.close(); | ||
| } finally { | ||
| span.endSpan(); | ||
| } | ||
| } | ||
|
|
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| @Override | ||
| public void addCloseListener(ActionListener<Void> listener) { | ||
| delegate.addCloseListener(listener); | ||
| } | ||
|
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| @Override | ||
| public boolean isOpen() { | ||
| return delegate.isOpen(); | ||
| } | ||
|
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| @Override | ||
| public boolean isServerChannel() { | ||
| return delegate.isServerChannel(); | ||
| } | ||
|
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| @Override | ||
| public String getProfile() { | ||
| return delegate.getProfile(); | ||
| } | ||
|
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| @Override | ||
| public InetSocketAddress getLocalAddress() { | ||
| return delegate.getLocalAddress(); | ||
| } | ||
|
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| @Override | ||
| public InetSocketAddress getRemoteAddress() { | ||
| return delegate.getRemoteAddress(); | ||
| } | ||
|
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| @Override | ||
| public void sendMessage(BytesReference reference, ActionListener<Void> listener) { | ||
| try (SpanScope scope = tracer.withSpanInScope(span)) { | ||
| delegate.sendMessage(reference, listener); | ||
| } finally { | ||
| span.endSpan(); | ||
| } | ||
| } | ||
|
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| @Override | ||
| public void addConnectListener(ActionListener<Void> listener) { | ||
| delegate.addConnectListener(listener); | ||
| } | ||
|
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| @Override | ||
| public ChannelStats getChannelStats() { | ||
| return delegate.getChannelStats(); | ||
| } | ||
| } |
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