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TEIIDTOOLS-437 initial opentracing commit
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83 changes: 83 additions & 0 deletions
83
client/src/main/java/org/teiid/jdbc/tracing/GlobalTracerInjector.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| /* | ||
| * Copyright Red Hat, Inc. and/or its affiliates | ||
| * and other contributors as indicated by the @author tags and | ||
| * the COPYRIGHT.txt file distributed with this work. | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
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| package org.teiid.jdbc.tracing; | ||
|
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| import java.util.HashMap; | ||
| import java.util.Map; | ||
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| import org.teiid.jdbc.tracing.TracingHelper.Injector; | ||
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| import io.opentracing.Span; | ||
| import io.opentracing.Tracer; | ||
| import io.opentracing.propagation.Format.Builtin; | ||
| import io.opentracing.propagation.TextMapInjectAdapter; | ||
| import io.opentracing.util.GlobalTracer; | ||
|
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| /** | ||
| * Uses the opentracing library to create a json string representation of the span context | ||
| * and provides a way to manipulate a static tracer without using the GlobalTracer registration | ||
| */ | ||
| public class GlobalTracerInjector implements Injector { | ||
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| private static Tracer TRACER = GlobalTracer.get(); | ||
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| @Override | ||
| public String getSpanContext() { | ||
| return getSpanContext(TRACER); | ||
| } | ||
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| protected static String getSpanContext(Tracer tracer) { | ||
| Span span = tracer.activeSpan(); | ||
| if (span == null) { | ||
| return null; | ||
| } | ||
| Map<String,String> spanMap = new HashMap<String, String>(); | ||
| tracer.inject(span.context(), Builtin.TEXT_MAP, new TextMapInjectAdapter(spanMap)); | ||
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| //simple json creation | ||
| StringBuilder json = new StringBuilder(); | ||
| json.append('{'); | ||
| boolean first = true; | ||
| for (Map.Entry<String, String> entry : spanMap.entrySet()) { | ||
| if (!first) { | ||
| json.append(','); | ||
| } else { | ||
| first = false; | ||
| } | ||
| json.append('"').append(entry.getKey().replace("\"", "\\\"")) //$NON-NLS-1$ //$NON-NLS-2$ | ||
| .append("\":\"") //$NON-NLS-1$ | ||
| .append(entry.getValue().replace("\"", "\\\"")).append('"'); //$NON-NLS-1$ //$NON-NLS-2$ | ||
| } | ||
| json.append('}'); | ||
| return json.toString(); | ||
| } | ||
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| /* | ||
| * Used to workaround that the GlobalTracer can only be registered once. | ||
| */ | ||
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| public static Tracer getTracer() { | ||
| return TRACER; | ||
| } | ||
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| public static void setTracer(Tracer tracer) { | ||
| TRACER = tracer; | ||
| } | ||
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| } |
59 changes: 59 additions & 0 deletions
59
client/src/main/java/org/teiid/jdbc/tracing/TracingHelper.java
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|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| /* | ||
| * Copyright Red Hat, Inc. and/or its affiliates | ||
| * and other contributors as indicated by the @author tags and | ||
| * the COPYRIGHT.txt file distributed with this work. | ||
| * | ||
| * 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. | ||
| */ | ||
|
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| package org.teiid.jdbc.tracing; | ||
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| import java.util.logging.Level; | ||
| import java.util.logging.Logger; | ||
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| import org.teiid.core.util.ReflectionHelper; | ||
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| /** | ||
| * Used to reflection load logic that is dependent upon the opentracing library, or provide a dummy implementation | ||
| */ | ||
| public class TracingHelper { | ||
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| public interface Injector { | ||
| String getSpanContext(); | ||
| } | ||
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| private static Logger logger = Logger.getLogger("org.teiid.jdbc"); //$NON-NLS-1$ | ||
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| private static Injector INJECTOR; | ||
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| public static String getSpanContext() { | ||
| if (INJECTOR == null) { | ||
| try { | ||
| INJECTOR = (Injector) ReflectionHelper.create("org.teiid.jdbc.tracing.GlobalTracerInjector", null, TracingHelper.class.getClassLoader()); //$NON-NLS-1$ | ||
| } catch (Throwable e) { //must catch both Error and Exception | ||
| logger.log(Level.FINE, "Unable to load opentracing libraries, propagation will not be used", e); //$NON-NLS-1$ | ||
| } | ||
| if (INJECTOR == null) { | ||
| INJECTOR = new Injector() { | ||
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| @Override | ||
| public String getSpanContext() { | ||
| return null; | ||
| } | ||
| }; | ||
| } | ||
| } | ||
| return INJECTOR.getSpanContext(); | ||
| } | ||
|
|
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| } |
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42 changes: 42 additions & 0 deletions
42
client/src/test/java/org/teiid/jdbc/tracing/TestTracing.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| /* | ||
| * Copyright Red Hat, Inc. and/or its affiliates | ||
| * and other contributors as indicated by the @author tags and | ||
| * the COPYRIGHT.txt file distributed with this work. | ||
| * | ||
| * 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. | ||
| */ | ||
|
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| package org.teiid.jdbc.tracing; | ||
|
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| import static org.junit.Assert.*; | ||
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| import org.junit.Test; | ||
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| import io.opentracing.Scope; | ||
| import io.opentracing.mock.MockTracer; | ||
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| @SuppressWarnings("nls") | ||
| public class TestTracing { | ||
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| @Test public void testSpanContextInjection() { | ||
| MockTracer tracer = new MockTracer(); | ||
| assertNull(GlobalTracerInjector.getSpanContext(tracer)); | ||
| Scope ignored = tracer.buildSpan("x").startActive(true); | ||
| try { | ||
| assertEquals("{\"spanid\":\"2\",\"traceid\":\"1\"}", GlobalTracerInjector.getSpanContext(tracer)); | ||
| } finally { | ||
| ignored.close(); | ||
| } | ||
| } | ||
|
|
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| } |
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