private void dumpThreads()

in src/main/java/org/apache/sling/launchpad/app/ControlListener.java [305:405]
78 lines of code
14 McCabe index (conditional complexity)

    private void dumpThreads(final Socket socket) throws IOException {

        final ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
        final ThreadInfo[] threadInfos = threadBean.dumpAllThreads(true, true);

        for (ThreadInfo thread : threadInfos) {
            printThread(socket, thread);

            // add locked synchronizers
            final LockInfo[] locks = thread.getLockedSynchronizers();
            writeLine(socket, "-");
            writeLine(socket, "-   Locked ownable synchronizers:");
            if (locks.length > 0) {
                for (LockInfo li : locks) {
                    writeLine(socket, String.format("-        - locked %s",
                        formatLockInfo(
                            li.getClassName(),
                            li.getIdentityHashCode()
                        )
                    ));
                }
            } else {
                writeLine(socket, "-        - None");
            }

            // empty separator line
            writeLine(socket, "-");
        }

        final long[] deadLocked;
        if (threadBean.isSynchronizerUsageSupported()) {
            deadLocked = threadBean.findDeadlockedThreads();
        } else {
            deadLocked = threadBean.findMonitorDeadlockedThreads();
        }
        if (deadLocked != null) {
            final ThreadInfo[] dl = threadBean.getThreadInfo(deadLocked, true, true);
            final Set<ThreadInfo> dlSet = new HashSet<ThreadInfo>(Arrays.asList(dl));
            int deadlockCount = 0;
            for (ThreadInfo current : dl) {
                if (dlSet.remove(current)) {

                    // find and record a single deadlock
                    ArrayList<ThreadInfo> loop = new ArrayList<ThreadInfo>();
                    do {
                        loop.add(current);
                        for (ThreadInfo cand : dl) {
                            if (cand.getThreadId() == current.getLockOwnerId()) {
                                current = (dlSet.remove(cand)) ? cand : null;
                                break;
                            }
                        }
                    } while (current != null);

                    deadlockCount++;

                    // print the deadlock
                    writeLine(socket, "-Found one Java-level deadlock:");
                    writeLine(socket, "-=============================");
                    for (ThreadInfo thread : loop) {
                        writeLine(socket, String.format("-\"%s\" #%d",
                            thread.getThreadName(),
                            thread.getThreadId()
                        ));
                        writeLine(socket, String.format("-  waiting on %s",
                            formatLockInfo(
                                thread.getLockInfo().getClassName(),
                                thread.getLockInfo().getIdentityHashCode()
                            )
                        ));
                        writeLine(socket, String.format("-  which is held by \"%s\" #%d",
                            thread.getLockOwnerName(),
                            thread.getLockOwnerId()
                        ));
                    }
                    writeLine(socket, "-");

                    writeLine(socket, "-Java stack information for the threads listed above:");
                    writeLine(socket, "-===================================================");

                    for (ThreadInfo thread : loop) {
                        printThread(socket, thread);
                    }
                    writeLine(socket, "-");
                }
            }

//            "Thread-8":
//                waiting to lock monitor 7f89fb80da08 (object 7f37a0968, a java.lang.Object),
//                which is held by "Thread-7"
//              "Thread-7":
//                waiting to lock monitor 7f89fb80b0b0 (object 7f37a0958, a java.lang.Object),
//                which is held by "Thread-8"

            writeLine(socket, String.format("-Found %d deadlocks.",
                deadlockCount
            ));
        }

        writeLine(socket, RESPONSE_OK);
    }