public void execute()

in core-it-support/core-it-plugins/maven-it-plugin-active-collection/src/main/java/org/apache/maven/plugin/coreit/CheckThreadSafetyMojo.java [74:154]
67 lines of code
14 McCabe index (conditional complexity)

    public void execute() throws MojoExecutionException {
        Properties componentProperties = new Properties();

        getLog().info("[MAVEN-CORE-IT-LOG] Testing concurrent component access");

        ClassLoader pluginRealm = getClass().getClassLoader();
        ClassLoader coreRealm = MojoExecutionException.class.getClassLoader();

        final Map map = componentMap;
        final List list = componentList;
        final List go = new Vector();
        final List exceptions = new Vector();

        Thread[] threads = new Thread[2];
        for (int i = 0; i < threads.length; i++) {
            // NOTE: The threads need to use different realms to trigger changes of the collections
            final ClassLoader cl = (i % 2) == 0 ? pluginRealm : coreRealm;
            threads[i] = new Thread() {
                private final ClassLoader tccl = cl;

                public void run() {
                    getLog().info("[MAVEN-CORE-IT-LOG] Thread " + this + " uses " + tccl);
                    Thread.currentThread().setContextClassLoader(tccl);
                    while (go.isEmpty()) {
                        // wait for start
                    }
                    for (int j = 0; j < 10 * 1000; j++) {
                        try {
                            for (Object o : map.values()) {
                                o.toString();
                            }
                            for (Object aList : list) {
                                aList.toString();
                            }
                        } catch (Exception e) {
                            getLog().warn("[MAVEN-CORE-IT-LOG] Thread " + this + " encountered concurrency issue", e);
                            exceptions.add(e);
                        }
                    }
                }
            };
            threads[i].start();
        }

        go.add(null);
        for (Thread thread : threads) {
            try {
                thread.join();
            } catch (InterruptedException e) {
                getLog().warn("[MAVEN-CORE-IT-LOG] Interrupted while joining " + thread);
            }
        }

        componentProperties.setProperty("components", Integer.toString(componentList.size()));
        componentProperties.setProperty("exceptions", Integer.toString(exceptions.size()));

        if (!outputFile.isAbsolute()) {
            outputFile = new File(basedir, outputFile.getPath());
        }

        getLog().info("[MAVEN-CORE-IT-LOG] Creating output file " + outputFile);

        OutputStream out = null;
        try {
            outputFile.getParentFile().mkdirs();
            out = new FileOutputStream(outputFile);
            componentProperties.store(out, "MAVEN-CORE-IT-LOG");
        } catch (IOException e) {
            throw new MojoExecutionException("Output file could not be created: " + outputFile, e);
        } finally {
            if (out != null) {
                try {
                    out.close();
                } catch (IOException e) {
                    // just ignore
                }
            }
        }

        getLog().info("[MAVEN-CORE-IT-LOG] Created output file " + outputFile);
    }