https://build.spring.io/browse/INT-AT42SIO-253/
```
java.lang.AssertionError: Should have been able to lock with zookeeper server restarted!
at org.junit.Assert.fail(Assert.java:88)
at org.junit.Assert.assertTrue(Assert.java:41)
at org.springframework.integration.zookeeper.lock.ZkLockRegistryTests.voidLockFailsWhenServerDown(ZkLockRegistryTests.java:339)
```
When we do `testingServer.restart();` we should give more time to let it started on background, therefore increase the next `lock2.tryLock()` to 10 seconds.
**Cherry-pick to 4.3.x and 4.2.x**
JIRA: https://jira.spring.io/browse/INT-4087
Fixes GH-1863 (https://github.com/spring-projects/spring-integration/issues/1863)
If ZK Client loses the connection to ensemble, it tries to reconnect on the next operation and does that exactly for the `connectionTimeoutMs` and provided `RetryPolicy`.
According to the `Lock.tryLock(long time, TimeUnit unit)` contract we can wait for the lock only during provided `timeout`.
* Introduce `mutexTaskExecutor` and perform `ZK.forPath()` command in the separate `Thread` and wait for the `Future` during provided timeout.
* Perform `mutex.acquire()` only after successful `Future` result and only for the remained timeout.
**Cherry-pick to 4.2.x**
Add `setMutexTaskExecutor()`
Fix Checkstyle typo
Javadoc
* Fix several typos in log messages. And some test on the matter as well
* Add comment to `AbstractPersistentAcceptOnceFileListFilter.rollback()` to clarify the reason of `rollingBack` variable
* Make `RemoteFileTemplate.StreamHolder` as `static` to avoid extra internal variable to outer class instance
* Replace `MessagingException` with `AbstractInboundFileSynchronizingMessageSource` in `init()` method of some components. It isn't Messaging yet in that phase
* Fix `SubscribableRedisChannel.MessageListenerDelegate` to handle `Object` not `String`, because with the `serializer` injection there is no guaranty that incoming is always `String`
* Move `JSch.setLogger(new JschLogger());` in the `DefaultSftpSessionFactory` to `static` block. It really should be done only once
* Remove `Assert.isTrue(this.port >= 0)` from the `DefaultSftpSessionFactory`. The subsequant `initJschSession()` convert it to default `22` port
* Change in the `JschProxyFactoryBean` `UnsupportedOperationException` to `IllegalArgumentException`. Wrong enum is wrong argument. That isn't a problem of operation
* Simplify `stop()` in the `CuratorFrameworkFactoryBean` and mark it as a `this.running = false`. Otherwise it wasn't able to be restarted
* Expose `leaderEventPublisher` in the `LeaderInitiatorFactoryBean` and fix `stop(Runnable callback)` with propagation `callback` to delegate.
Fix `SubscribableRedisChannelTests` for new `handleMessage(Object)` signature
Two initiators for the same path, same `SmartLifecycleRoleController` and, finally, same `adapter`.
So, one initiator after `yield()` stops the `adapter` and at the same time another starts it.
Since there is no barrier in between events and assertion, we end up with an early "re-granting".
* Add `CountDownLatch yieldBarrier` to `countDown()` after performing second `adapter.isRunning()` assert
* `LeaderEventPublisher` waits for the `yieldBarrier` after the first `OnRevokedEvent`
JIRA: https://jira.spring.io/browse/INT-4058
If you hold the lock, you are the leader. This simple idea gets you
a long way if there is no "native" leader initiator. E.g. you
can use this with a RDBMS with JdbcLockRegistry.
Add some docs on leader election under "endpoints"
Make thread name for leader initiator unique
In case there are multiple instances in the same context we would
like to be able to spot them in the logs.
INT-4058: Polishing
* Code refactoring in the `LockRegistryLeaderInitiator`: SI use 120 line length
* Add `Assert.notNull()` for required properties
* Add `this.lock.unlock()` and `Thread.sleep(LockRegistryLeaderInitiator.this.busyWaitMillis)` into the `catch` block to let distributed elections to work.
Otherwise there is a big chance that we will acquire the lock and become a leader again just after `yield()`
* Change `LockContext.toString()` to use simple `String` concatenation which is optimized by compiler to the `StringBuilder`.
That let to have some better micro-performance compared with with extra `Formatter` object in case of `String.format()`
* Add `JdbcLockRegistryLeaderInitiatorTests`
* Fix `yield()` logic based on the `Future.cancel(true)`.
Since one `FutureTask.cancel(true)` makes it as `INTERRUPTED` any subsequent `yield()` does not make any effect, therefore our infinite selector loop isn't interrupted one more time.
* Reschedule the `LeaderSelector` in the `yield()` after cancel(true).
* Rework `catch` in the selector loop just to the `InterruptedException` and `return null;` to stop looping and let reschedule the selector.
* Add one more `onRevoked` logic into the `final` of the selector loop to notify that we have lost leadership during `stop()`
* Improve `JdbcLockRegistryLeaderInitiatorTests` to ensure that several `yield()` on the same initiator work well.
* Add `What's New` note.
* Upgrade to SA and SF snapshots
* Address TODOs regarding those upgrades
* Resolve some other TODOs
* Replace `PropertyPlaceholderConfigurer` beans with the `<context:property-placeholder>`
* Upgrade to Spring Social Twitter 1.1.2 and resolve deprecations via mocks (https://github.com/spring-projects/spring-social-twitter/issues/91)
* Upgrade to Curator `3.1.0` and resolve deprecation in the `ZookeeperMetadataStore`
fixes
fixModifiers after fixFinal
Revert CachingSessionFactory
Class is spied in tests.
checkstyle - Import Rules
checkstyle InterfaceIsType
checkstyle InnerTypeLast
checkstyle OneStatementPerLine
CovariantEquals
OneTopLevelClass
* Revert `'\n'` -> `System.lineSeparator()` in the Gradle scripts to meet Git `autocrlf = true` on Windows
* Fix timing issue with the `LastModifiedFileListFilterTests`, when the `age = 1` might not be enough for the file object when we have some delay before checking
* `gradlew clean check -x test --parallel --continue` - to collect reports
* `gradlew fixThis --parallel` - to fix all possible vulnerabilities. With `-Dfile.encoding=UTF-8` on Windows
Since the `RequireThisCheck` doesn't see parents for anonymous classes (e.g. `Runnable` callback), its report doesn't contains the outer class name with `this.`,
therefore we still have to fix those cases manually.
Thanks to the wrong `replacer` just with `this.` we have uncompilable code enough easy to find problems.
Not so easy to fix for good readability though...
* Upgrade to Grade 2.12
* Upgrade to SonarQube native plugin
The fix contains at about 300 files. So, will be done on merge.
Fix `fixThis.gradle` according PR comments
Apply `fixThis` and also `fixModifiers` for test classes.
Fix some `this.` inner issues manually.
Make code polishing for long lines after `fixThis`
Fix conflicts and vulnerabilities after the rebase
JIRA: https://jira.spring.io/browse/INT-3926
* Add `<poller>` for all `<outbound-adapter(gateway)>`
* Add/modify tests for `<queue>` as an input channel and particular `<poller>`
* Move XSD from the `xml` package to the `config` level to achieve the consistency throughout the project.
JIRA: https://jira.spring.io/browse/INT-3916
The `JpaOutboundGatewayFactoryBean` used CTOR injection for the `JpaExecutor`.
That one, in turn, uses CTOR injection for the `EntityManagerFactory`.
Such a dependency may cause the `early bean instantiating` in case of `AbstractAutowireCapableBeanFactory.getSingletonFactoryBeanForTypeCheck()`.
And we end up with the `BeanCurrentlyInCreationException`.
Therefore no one `FactoryBean` should use CTOR injection if there is a potential hierarchical dependency.
NOTE: there is no tests on the matter, since we don't change the components behavior.
The `JPA` sample application will be changed to the Boot to track this fix.
**Cherry-pick to 4.2.x**
Address PR comments and fix other `FactoryBean`s for the same issue, when it is reasonable
Polishing
Address PR comments
Make setter `setSockJsTaskScheduler` as `public`
Leadership was yielded before testing whether the adapter was started when leadership was granted.
It was possible for the adapter to be stopped again before testing `isRunning()`.
JIRA: https://jira.spring.io/browse/INT-3781
- Add mechanisms to set status code on an inbound gateway timeout.
- Send a message to the error channel if configured.
Polishing - Add failedMessage to MTE
Fix Schema Docs; Timeout Detection on Error Flow
Add Zookeeper Leadership Logs
Fix typo in the `SmartLifecycleRoleController`
This should be treated as experimental but with these changes it seems to build ok.
BUILD SUCCESSFUL
Total time: 5 mins 15.533 secs
It turns out that our sporadic Redis problems were fixed in a later version of Jedis.
The problem was that the `connection.subscribe()` exited immediately. When I started adding debug
logic, the problem went away (because I was using a newer versio of Jedis).
spring-data-redis 1.5.2 is updated to work with the 2.7.3 version of Jedis.
Polishing
JIRA: https://jira.spring.io/browse/INT-3617
Start/stop `SmartLifecyle` beans with leader election/revocation.
ZK Namespace Support
Add Annotation Support
INT-3617: Polishing
Add `SmartLifecycle` to listener parser.
INT-3617: Polishing; PR Comments
Revert SmartLifecycleRoleController
Remove reflection.
Remove Dependence on spring-cloud-cluster
Temporarily move the relevant classes here.
Polishing; PR Comments and Fix Test
Test was incorrectly stopping the LeaderInitiator before it was elected.
Set auto-startup="false" in the i-c-a so we wait for its start before
stopping the LeaderInitiator.
Fix JavaDocs
JIRA: https://jira.spring.io/browse/INT-3616
Zookeeper implementation of `LockRegistry`, for example to support
clustered aggregators (when using external message group stores).
INT-3616: Polishing; PR Comments
JIRA: https://jira.spring.io/browse/INT-3691
- create new core interfaces `ListenableMetadataStore` and `MessageStoreListener`;
- create new module `spring-integration-zookeeper`;
- add `ZookeeperMetadataStore` implementation
Polishing
Polishing
- moved classes into core/test where necessary, including conversion methods
- properly renamed `MetadataStoreListenerAdapter`
