Examples of org.apache.curator.framework.recipes.leader.LeaderLatch.await()

org.apache.curator.framework.recipes.leader.LeaderLatch.await()

Causes the current thread to wait until this instance acquires leadership unless the thread is {@linkplain Thread#interrupt interrupted} or {@linkplain #close() closed}.

If this instance already is the leader then this method returns immediately.

Otherwise the current thread becomes disabled for thread scheduling purposes and lies dormant until one of three things happen:

This instance becomes the leader
Some other thread {@linkplain Thread#interrupt interrupts}the current thread
The instance is {@linkplain #close() closed}

If the current thread:

has its interrupted status set on entry to this method; or
is {@linkplain Thread#interrupt interrupted} while waiting,

then {@link InterruptedException} is thrown and the current thread'sinterrupted status is cleared.

@throws InterruptedException if the current thread is interruptedwhile waiting @throws EOFException if the instance is {@linkplain #close() closed}while waiting

                LeaderLatch latch = startLeaderLatch();


                // Wait until (a) leadership is acquired or (b) the latch is closed by service shutdown or ZK cxn loss.
                if (isRunning()) {
                    try {
                        latch.await();
                    } catch (EOFException e) {
                        // Latch was closed while we were waiting.
                        checkState(!latch.hasLeadership());
                    }
                }

            };
            leaderLatch.addListener(listener);


            if ( waitForLeadershipMs > 0 )
            {
                leaderLatch.await(waitForLeadershipMs, TimeUnit.MILLISECONDS);
            }


            return new LeaderResult(new LeaderProjection(id), leaderLatch.hasLeadership());
        }
        catch ( Exception e )

                LeaderLatch latch = startLeaderLatch();


                // Wait until (a) leadership is acquired or (b) the latch is closed by service shutdown or ZK cxn loss.
                if (isRunning()) {
                    try {
                        latch.await();
                    } catch (EOFException e) {
                        // Latch was closed while we were waiting.
                        checkState(!latch.hasLeadership());
                    }
                }

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