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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| plugins { | ||
| id("me.champeau.jmh") | ||
| } | ||
|
|
||
| apply(from = "$rootDir/gradle/java.gradle") | ||
|
|
||
| jmh { | ||
| version = "1.28" | ||
| } | ||
|
|
||
| val excludedClassesInstructionCoverage by extra { | ||
| listOf("datadog.context.ContextProviders") // covered by forked test | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| # This is a Gradle generated file for dependency locking. | ||
| # Manual edits can break the build and are not advised. | ||
| # This file is expected to be part of source control. | ||
| ch.qos.logback:logback-classic:1.2.3=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| ch.qos.logback:logback-core:1.2.3=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| com.beust:jcommander:1.78=jmhRuntimeClasspath,testRuntimeClasspath | ||
| com.github.javaparser:javaparser-core:3.25.1=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| com.github.spotbugs:spotbugs-annotations:4.2.0=compileClasspath,jmhCompileClasspath,jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| com.github.spotbugs:spotbugs-annotations:4.7.3=spotbugs | ||
| com.github.spotbugs:spotbugs:4.7.3=spotbugs | ||
| com.google.code.findbugs:jsr305:3.0.2=compileClasspath,jmhCompileClasspath,jmhRuntimeClasspath,spotbugs,testCompileClasspath,testRuntimeClasspath | ||
| com.google.code.gson:gson:2.9.1=spotbugs | ||
| com.thoughtworks.qdox:qdox:1.12.1=jmhRuntimeClasspath,testRuntimeClasspath | ||
| commons-codec:commons-codec:1.15=spotbugs | ||
| de.thetaphi:forbiddenapis:3.1=compileClasspath,jmhCompileClasspath | ||
| info.picocli:picocli:4.6.3=jmhRuntimeClasspath,testRuntimeClasspath | ||
| jaxen:jaxen:1.2.0=spotbugs | ||
| jline:jline:2.14.6=jmhRuntimeClasspath,testRuntimeClasspath | ||
| junit:junit:4.13.2=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| net.jcip:jcip-annotations:1.0=compileClasspath,jmhCompileClasspath,jmhRuntimeClasspath,spotbugs,testCompileClasspath,testRuntimeClasspath | ||
| net.sf.jopt-simple:jopt-simple:5.0.4=jmh,jmhCompileClasspath,jmhRuntimeClasspath | ||
| net.sf.saxon:Saxon-HE:11.4=spotbugs | ||
| org.apache.ant:ant-antlr:1.10.12=jmhRuntimeClasspath,testRuntimeClasspath | ||
| org.apache.ant:ant-antlr:1.9.15=codenarc | ||
| org.apache.ant:ant-junit:1.10.12=jmhRuntimeClasspath,testRuntimeClasspath | ||
| org.apache.ant:ant-junit:1.9.15=codenarc | ||
| org.apache.ant:ant-launcher:1.10.12=jmhRuntimeClasspath,testRuntimeClasspath | ||
| org.apache.ant:ant:1.10.12=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.apache.bcel:bcel:6.5.0=spotbugs | ||
| org.apache.commons:commons-lang3:3.12.0=pitest,spotbugs | ||
| org.apache.commons:commons-math3:3.2=jmh,jmhCompileClasspath,jmhRuntimeClasspath | ||
| org.apache.commons:commons-text:1.10.0=pitest,spotbugs | ||
| org.apache.httpcomponents.client5:httpclient5:5.1.3=spotbugs | ||
| org.apache.httpcomponents.core5:httpcore5-h2:5.1.3=spotbugs | ||
| org.apache.httpcomponents.core5:httpcore5:5.1.3=spotbugs | ||
| org.apache.logging.log4j:log4j-api:2.19.0=spotbugs | ||
| org.apache.logging.log4j:log4j-core:2.19.0=spotbugs | ||
| org.apiguardian:apiguardian-api:1.1.2=testCompileClasspath | ||
| org.codehaus.groovy:groovy-all:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-ant:2.5.14=codenarc | ||
| org.codehaus.groovy:groovy-ant:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-astbuilder:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-cli-picocli:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-console:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-datetime:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-docgenerator:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-groovydoc:2.5.14=codenarc | ||
| org.codehaus.groovy:groovy-groovydoc:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-groovysh:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-jmx:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-json:2.5.14=codenarc | ||
| org.codehaus.groovy:groovy-json:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-jsr223:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-macro:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-nio:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-servlet:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-sql:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-swing:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-templates:2.5.14=codenarc | ||
| org.codehaus.groovy:groovy-templates:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-test-junit5:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-test:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-testng:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy-xml:2.5.14=codenarc | ||
| org.codehaus.groovy:groovy-xml:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codehaus.groovy:groovy:2.5.14=codenarc | ||
| org.codehaus.groovy:groovy:3.0.17=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.codenarc:CodeNarc:2.2.0=codenarc | ||
| org.dom4j:dom4j:2.1.3=spotbugs | ||
| org.gmetrics:GMetrics:1.1=codenarc | ||
| org.hamcrest:hamcrest-core:1.3=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.hamcrest:hamcrest:2.2=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.jacoco:org.jacoco.agent:0.8.5=jacocoAgent,jacocoAnt | ||
| org.jacoco:org.jacoco.ant:0.8.5=jacocoAnt | ||
| org.jacoco:org.jacoco.core:0.8.5=jacocoAnt | ||
| org.jacoco:org.jacoco.report:0.8.5=jacocoAnt | ||
| org.junit.jupiter:junit-jupiter-api:5.9.2=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.junit.jupiter:junit-jupiter-engine:5.9.2=jmhRuntimeClasspath,testRuntimeClasspath | ||
| org.junit.jupiter:junit-jupiter-params:5.9.2=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.junit.jupiter:junit-jupiter:5.9.2=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.junit.platform:junit-platform-commons:1.9.2=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.junit.platform:junit-platform-engine:1.9.2=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.junit.platform:junit-platform-launcher:1.9.2=jmhRuntimeClasspath,testRuntimeClasspath | ||
| org.junit:junit-bom:5.9.1=spotbugs | ||
| org.junit:junit-bom:5.9.2=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.objenesis:objenesis:3.3=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.openjdk.jmh:jmh-core:1.36=jmh,jmhCompileClasspath,jmhRuntimeClasspath | ||
| org.openjdk.jmh:jmh-generator-asm:1.36=jmh,jmhCompileClasspath,jmhRuntimeClasspath | ||
| org.openjdk.jmh:jmh-generator-bytecode:1.36=jmh,jmhCompileClasspath,jmhRuntimeClasspath | ||
| org.openjdk.jmh:jmh-generator-reflection:1.36=jmh,jmhCompileClasspath,jmhRuntimeClasspath | ||
| org.opentest4j:opentest4j:1.2.0=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.ow2.asm:asm-analysis:7.2=jacocoAnt | ||
| org.ow2.asm:asm-analysis:9.4=spotbugs | ||
| org.ow2.asm:asm-commons:7.2=jacocoAnt | ||
| org.ow2.asm:asm-commons:9.4=spotbugs | ||
| org.ow2.asm:asm-tree:7.2=jacocoAnt | ||
| org.ow2.asm:asm-tree:9.4=spotbugs | ||
| org.ow2.asm:asm-util:9.4=spotbugs | ||
| org.ow2.asm:asm:7.2=jacocoAnt | ||
| org.ow2.asm:asm:9.0=jmh,jmhCompileClasspath,jmhRuntimeClasspath | ||
| org.ow2.asm:asm:9.4=spotbugs | ||
| org.pitest:pitest-command-line:1.9.11=pitest | ||
| org.pitest:pitest-entry:1.9.11=pitest | ||
| org.pitest:pitest:1.9.11=pitest | ||
| org.slf4j:jcl-over-slf4j:1.7.30=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.slf4j:jul-to-slf4j:1.7.30=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.slf4j:log4j-over-slf4j:1.7.30=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.slf4j:slf4j-api:1.7.30=testCompileClasspath | ||
| org.slf4j:slf4j-api:1.7.32=jmhRuntimeClasspath,testRuntimeClasspath | ||
| org.slf4j:slf4j-api:2.0.0=spotbugs,spotbugsSlf4j | ||
| org.slf4j:slf4j-simple:2.0.0=spotbugsSlf4j | ||
| org.spockframework:spock-core:2.2-groovy-3.0=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.spockframework:spock-junit4:2.2-groovy-3.0=jmhRuntimeClasspath,testCompileClasspath,testRuntimeClasspath | ||
| org.testng:testng:7.5=jmhRuntimeClasspath,testRuntimeClasspath | ||
| org.webjars:jquery:3.5.1=jmhRuntimeClasspath,testRuntimeClasspath | ||
| org.xmlresolver:xmlresolver:4.4.3=spotbugs | ||
| xml-apis:xml-apis:1.4.01=spotbugs | ||
| empty=annotationProcessor,jmhAnnotationProcessor,runtimeClasspath,spotbugsPlugins,testAnnotationProcessor |
142 changes: 142 additions & 0 deletions
142
components/context/src/main/java/datadog/context/Context.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| package datadog.context; | ||
|
|
||
| import static datadog.context.ContextProviders.binder; | ||
| import static datadog.context.ContextProviders.manager; | ||
|
|
||
| import javax.annotation.Nullable; | ||
| import javax.annotation.ParametersAreNonnullByDefault; | ||
|
|
||
| /** | ||
| * Immutable context scoped to an execution unit or carrier object. | ||
| * | ||
| * <p>There are three ways to get a Context instance: | ||
| * | ||
| * <ul> | ||
| * <li>The first one is to retrieve the one from the current execution unit using {@link | ||
| * #current()}. A Context instance can be marked as current using {@link #attach()} within the | ||
| * execution unit. | ||
| * <li>The second one is to retrieve one from a carrier object using {@link #from(Object | ||
| * carrier)}. A Context instance would need to be attached to the carrier first using {@link | ||
| * #attachTo(Object carrier)} attached. | ||
| * <li>Finally, the third option is to get the default root Context instance calling {@link | ||
| * #root()}. | ||
| * </ul> | ||
| * | ||
| * <p>When there is no context attached to the current execution unit, {@link #current()} will | ||
| * return the root context. Similarly, {@link #from(Object carrier)} will return the root context | ||
| * when there is no context attached to the carrier. | ||
| * | ||
| * <p>From a {@link Context} instance, each value is stored and retrieved by its {@link ContextKey}, | ||
| * using {@link #with(ContextKey key, Object value)} to store a value (creating a new immutable | ||
| * {@link Context} instance), and {@link #get(ContextKey)} to retrieve it. {@link ContextKey}s | ||
| * represent product of functional areas, and should be created sparingly. | ||
| * | ||
| * <p>{@link Context} instances are thread safe as they are immutable (including their {@link | ||
| * ContextKey}) but the value they hold may themselves be mutable. | ||
| * | ||
| * @see ContextKey | ||
| */ | ||
| @ParametersAreNonnullByDefault | ||
| public interface Context { | ||
| /** | ||
| * Returns the root context. | ||
| * | ||
| * @return the initial local context that all contexts extend. | ||
| */ | ||
| static Context root() { | ||
| return manager().root(); | ||
| } | ||
|
|
||
| /** | ||
| * Returns the context attached to the current execution unit. | ||
| * | ||
| * @return the attached context; {@link #root()} if there is none. | ||
| */ | ||
| static Context current() { | ||
| return manager().current(); | ||
| } | ||
|
|
||
| /** | ||
| * Attaches this context to the current execution unit. | ||
| * | ||
| * @return a scope to be closed when the context is invalid. | ||
| */ | ||
| default ContextScope attach() { | ||
| return manager().attach(this); | ||
| } | ||
|
|
||
| /** | ||
| * Swaps this context with the one attached to current execution unit. | ||
| * | ||
| * @return the previously attached context; {@link #root()} if there was none. | ||
| */ | ||
| default Context swap() { | ||
| return manager().swap(this); | ||
| } | ||
|
|
||
| /** | ||
| * Returns the context attached to the given carrier object. | ||
| * | ||
| * @param carrier the carrier object to get the context from. | ||
| * @return the attached context; {@link #root()} if there is none. | ||
| */ | ||
| static Context from(Object carrier) { | ||
| return binder().from(carrier); | ||
| } | ||
|
|
||
| /** | ||
| * Attaches this context to the given carrier object. | ||
| * | ||
| * @param carrier the object to carry the context. | ||
| */ | ||
| default void attachTo(Object carrier) { | ||
| binder().attachTo(carrier, this); | ||
| } | ||
|
|
||
| /** | ||
| * Detaches the context attached to the given carrier object, leaving it context-less. | ||
| * | ||
| * @param carrier the carrier object to detach its context from. | ||
| * @return the previously attached context; {@link #root()} if there was none. | ||
| */ | ||
| static Context detachFrom(Object carrier) { | ||
| return binder().detachFrom(carrier); | ||
| } | ||
|
|
||
| /** | ||
| * Gets the value stored in this context under the given key. | ||
| * | ||
| * @param <T> the type of the value. | ||
| * @param key the key used to store the value. | ||
| * @return the value stored under the key; {@code null} if there is none. | ||
| */ | ||
| @Nullable | ||
| <T> T get(ContextKey<T> key); | ||
|
|
||
| /** | ||
| * Creates a copy of this context with the given key-value set. | ||
| * | ||
| * <p>Existing value with the given key will be replaced, and mapping to a {@code null} value will | ||
| * remove the key-value from the context copy. | ||
| * | ||
| * @param <T> the type of the value. | ||
| * @param key the key to store the value. | ||
| * @param value the value to store. | ||
| * @return a new context with the key-value set. | ||
| */ | ||
| <T> Context with(ContextKey<T> key, @Nullable T value); | ||
|
|
||
| /** | ||
| * Creates a copy of this context with the implicit key is mapped to the value. | ||
| * | ||
| * @param value the value to store. | ||
| * @return a new context with the implicitly keyed value set. | ||
| * @see #with(ContextKey, Object) | ||
| */ | ||
| default Context with(@Nullable ImplicitContextKeyed value) { | ||
| if (value == null) { | ||
| return root(); | ||
| } | ||
| return value.storeInto(this); | ||
| } | ||
| } |
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