![JMC Build](../../workflows/validate/badge.svg) # Mission Control Mission Control is an open source production time profiling and diagnostics tool for Java. Builds of Mission Control can currently be found in the Oracle JDK on supported platforms and in the Eclipse marketplace. For more information on Mission Control, see http://www.oracle.com/missioncontrol. ## Downloading Builds Binary distributions of JDK Mission Control are provided by different downstream vendors. ### AdoptOpenJDK * Released version * EA builds of upcoming release * Downloadable Eclipse update site archive [http://adoptopenjdk.net/jmc](http://adoptopenjdk.net/jmc) ### Azul (Zulu Mission Control) * Released version [https://www.azul.com/products/zulu-mission-control](https://www.azul.com/products/zulu-mission-control) ### Bell-Soft (Liberica Mission Control) * Released version [https://bell-sw.com/pages/lmc](https://bell-sw.com/pages/lmc) ### Oracle * Released version * Integrated (in-app) update site * Eclipse update site [https://www.oracle.com/java/technologies/jdk-mission-control.html](https://www.oracle.com/java/technologies/jdk-mission-control.html) ### Red Hat * Released version Red Hat distributes JDK Mission Control as RPMs in Fedora and RHEL. JMC is also included in the OpenJDK [developer builds](https://developers.redhat.com/products/openjdk/download) for Windows. ## Mission Control Features ### Application Features * A framework for hosting various useful Java tools * A tool for visualizing the contents of Java flight recordings, and the results of an automated analysis of the contents * A JMX Console * A tool for heap waste analysis ### Core API Features * Core APIs for parsing and processing Java flight recordings * Core API can *read* recordings from JDK 7 and above * Core API can *run* on JDK 8 and above * Core API contains a framework for handling units of measurement and physical quantities * Core API supports headless analysis of Java flight recordings ### Core API Example Example for producing an HTML report from the command line: ```bash java -cp org.openjdk.jmc.flightrecorder.rules.report.html.JfrHtmlRulesReport [] ``` Example for finding the standard deviation for the java monitor events in a recording: ```java import java.io.File; import org.openjdk.jmc.common.IDisplayable; import org.openjdk.jmc.common.item.Aggregators; import org.openjdk.jmc.common.item.IItemCollection; import org.openjdk.jmc.common.item.ItemFilters; import org.openjdk.jmc.common.unit.IQuantity; import org.openjdk.jmc.flightrecorder.JfrAttributes; import org.openjdk.jmc.flightrecorder.JfrLoaderToolkit; import org.openjdk.jmc.flightrecorder.jdk.JdkTypeIDs; /** * Finds out the standard deviation for the java monitor enter events. */ public class LoadRecording { public static void main(String[] args) throws Exception { IItemCollection events = JfrLoaderToolkit.loadEvents(new File(args[0])); IQuantity aggregate = events.apply(ItemFilters.type(JdkTypeIDs.MONITOR_ENTER)) .getAggregate(Aggregators.stddev(JfrAttributes.DURATION)); System.out.println("The standard deviation for the Java monitor enter events was " + aggregate.displayUsing(IDisplayable.AUTO)); } } ``` Example for programmatically running the rules: ```java import java.io.File; import java.util.concurrent.RunnableFuture; import org.example.util.DemoToolkit; import org.openjdk.jmc.common.item.IItemCollection; import org.openjdk.jmc.common.util.IPreferenceValueProvider; import org.openjdk.jmc.flightrecorder.JfrLoaderToolkit; import org.openjdk.jmc.flightrecorder.rules.IRule; import org.openjdk.jmc.flightrecorder.rules.Result; import org.openjdk.jmc.flightrecorder.rules.RuleRegistry; public class RunRulesOnFileSimple { public static void main(String[] args) throws Exception { File recording = DemoToolkit.verifyRecordingArgument(RunRulesOnFileSimple.class, args); IItemCollection events = JfrLoaderToolkit.loadEvents(recording); for (IRule rule : RuleRegistry.getRules()) { RunnableFuture future = rule.evaluate(events, IPreferenceValueProvider.DEFAULT_VALUES); future.run(); Result result = future.get(); if (result.getScore() > 50) { System.out.println(String.format("[Score: %3.0f] Rule ID: %s, Rule name: %s, Short description: %s", result.getScore(), result.getRule().getId(), result.getRule().getName(), result.getShortDescription())); } } } } ``` Example for programmatically running rules in parallel: ```java import java.io.File; import java.util.List; import java.util.concurrent.ExecutionException; import java.util.concurrent.Executor; import java.util.concurrent.Executors; import java.util.concurrent.RunnableFuture; import java.util.stream.Collectors; import java.util.stream.Stream; import org.openjdk.jmc.common.item.IItemCollection; import org.openjdk.jmc.common.util.IPreferenceValueProvider; import org.openjdk.jmc.flightrecorder.JfrLoaderToolkit; import org.openjdk.jmc.flightrecorder.rules.IRule; import org.openjdk.jmc.flightrecorder.rules.Result; import org.openjdk.jmc.flightrecorder.rules.RuleRegistry; /** * Runs the rules on the events in the specified file in parallel, then prints * them in order of descending score. */ public class RunRulesOnFile { private final static Executor EXECUTOR = Executors .newFixedThreadPool(Runtime.getRuntime().availableProcessors() - 1); private static int limit; public static void main(String[] args) throws Exception { if (args.length == 0) { System.out.println( "Usage: RunRulesOnFile []\n\tThe recording file must be a flight recording from JDK 7 or above. The limit, if set, will only report rules triggered with a score higher or equal than the limit."); System.exit(2); } IItemCollection events = JfrLoaderToolkit.loadEvents(new File(args[0])); if (args.length > 1) { limit = Integer.parseInt(args[1]); } Stream> resultFutures = RuleRegistry.getRules().stream() .map((IRule r) -> evaluate(r, events)); List results = resultFutures.parallel().map((RunnableFuture runnable) -> get(runnable)) .collect(Collectors.toList()); results.sort((Result r1, Result r2) -> Double.compare(r2.getScore(), r1.getScore())); results.stream().forEach(RunRulesOnFile::printResult); } public static RunnableFuture evaluate(IRule rule, IItemCollection events) { RunnableFuture evaluation = rule.evaluate(events, IPreferenceValueProvider.DEFAULT_VALUES); EXECUTOR.execute(evaluation); return evaluation; } public static Result get(RunnableFuture resultFuture) { try { return resultFuture.get(); } catch (InterruptedException | ExecutionException e) { e.printStackTrace(); } return null; } private static void printResult(Result result) { if (result.getScore() >= limit) { System.out.printf("(%.0f) [%s]: %s\nDetails:\n%s\n========================\n", result.getScore(), result.getRule().getId(), result.getShortDescription(), result.getLongDescription() == null ? "" : result.getLongDescription()); } } } ``` ## Building Mission Control from Source Prerequisites for building Mission Control: 1. Install JDK 11, and make sure it is the JDK in use (java -version) 2. Install Maven (version 3.3.x. or above) On Linux or macOS you can use the build.sh script to build JMC: ``` usage: call ./build.sh with the following options: --installCore to install the core artifacts --test to run the tests --testUi to run the tests including UI tests --packageJmc to package JMC --clean to run maven clean ``` Otherwise follow the steps manually: First get third party dependencies into a local p2 repo and make it available on localhost: ```bash cd missioncontrolfolder [where you just cloned the sources] cd releng/third-party mvn p2:site mvn jetty:run ``` Then in another terminal (in the project root): ```bash cd core mvn clean install cd .. mvn package ``` Note that you may need to define proxy settings if you happen to be behind a firewall. In your ~/.m2/settings.xml file (if you have none, simply create one), add: ```xml http-proxy true http my.proxy.example.org 80 localhost|*.example.org https-proxy true https my.proxy.example.org 80 localhost|*.example.org ``` ## Running Tests To run the unit tests: ```bash mvn verify ``` To run the UI tests: ```bash mvn verify -P uitests ``` Note that the UI tests will take some time to run, and that you need to stop interacting with your computer for the duration of the tests. Spotbugs can take some time to run. If you are only interested in the test results, you can skip running spotbugs by setting `-Dspotbugs.skip=true`. For example: ```bash mvn verify -P uitests -Dspotbugs.skip=true ``` ## Filtering Test Runs Aside from the from the simple -test Maven flag test classes that should be run/not run can be specified by means of the system properties "test.includes" and/or "test.excludes". Multiple patterns can be specified by comma separation. For example: ```bash mvn verify -Dtest.includes=**/*TestRulesWithJfr*,**/*StacktraceModelTest* ``` When specifying both test.includes and "test.excludes" the test.excludes takes precedence and filters out tests that also are matched by "test.includes". For example: ```bash mvn verify -P uitests -Dtest.includes=**/*SystemTabTest*,**/*TestRulesWithJfr*,**/*StacktraceModelTest* -Dtest.excludes=**/*ModelTest* ``` The above will not run StacktraceModelTest, as that is also matched by "test.excludes". Note that if UI-tests are supposed to be part of the filtered run the "uitests" profile needs to be specified as well. Otherwise the UI won't start up and so the tests fail. ## Building using docker and docker-compose ``` docker-compose -f docker/docker-compose.yml run jmc ``` Once build has finished the results will be in the `target` directory ## Running the Locally Built JMC The built JMC will end up in the `target` folder in the root. The launcher is located in `target/products/org.openjdk.jmc/`. By default whichever JRE is on the path will be used. Remember to set it to a JDK (rather than a JRE) if you want the launched mission control to automatically discover locally running JVMs. To override which JVM to use when launching, add -vm and the path to a directory where a JDK java launcher is located, for example -vm $JAVA_HOME/bin. Here is an example for Mac OS X: ```bash target/products/org.openjdk.jmc/macosx/cocoa/x86_64/JDK\ Mission\ Control.app/Contents/MacOS/jmc ``` Here is an example for Linux: ```bash target/products/org.openjdk.jmc/linux/gtk/x86_64/JDK\ Mission\ Control/jmc ``` And here is an example for Windows x64: ```bash "target\products\org.openjdk.jmc\win32\win32\x86_64\JDK Mission Control\jmc" ``` ## Using the Built JMC Update Site in Eclipse As part of the JMC build, the JMC update sites will be built. There is one update site for the stand-alone RCP application, providing plug-ins for the stand-alone release of JMC: ```bash application/org.openjdk.jmc.updatesite.rcp/target/ ``` There is another update site for the Eclipse plug-ins, providing plug-ins for running JMC inside of Eclipse: ```bash application/org.openjdk.jmc.updatesite.ide/target/ ``` To install it into Eclipe, simply open Eclipse and select Help | Install New Software... In the dialog, click Add... and then click the Archive... button. Select the built update site, e.g. ```bash application/org.openjdk.jmc.updatesite.ide/target/org.openjdk.jmc.updatesite.ide-8.1.1-SNAPSHOT.zip ``` ## Setting up Development Environment Please follow the [Developer Guide](docs/devguide/README.md). ## FAQ For help with frequently asked questions, see the [JMC FAQ](https://wiki.openjdk.java.net/display/jmc/JMC+FAQ) on the JMC Wiki. ## License The Mission Control source code is made available under the Universal Permissive License (UPL), Version 1.0 or a BSD-style license, alternatively. The full open source license text is available at license/LICENSE.txt in the JMC project. ## About Mission Control is an open source project of the [OpenJDK](http://openjdk.java.net/). The Mission Control project originated from the JRockit JVM project.