java - 如何使用 Redis 适配器写入 Geode，然后使用 Geode 客户端读取/响应事件？

标签 java redis gemfire apache-kafka-connect geode

我正在尝试执行以下操作:

  1. 使用 redis 连接器将一些数据放入 geode
  2. 使用 CacheListener 对一些关键的创建/更新事件作出 react
  3. 使用 Geode 客户端及其区域上的 entrySet 方法读取该数据。

我已经无法从我的 Geode 客户端访问 redis 数据。我必须执行以下操作:

region.get(Coder.stringToByteArrayWrapper("key"));

我在使 region.entrySet() 工作时也遇到了很多麻烦。首先，它对 ClientRegionShortcut.PROXY 根本不起作用，而且它似乎只有 50% 的时间与 ClientRegionShortcut.CACHING_PROXY 一起工作。

这是我用来测试这个的代码(注意我使用 lettuce 作为 redis 客户端):

@Test
public void test_subscribe() throws InterruptedException, ExecutionException {
    ClientCache cache = new ClientCacheFactory()
        .addPoolLocator(HOST, LOCATOR_PORT)
        .create();

    @SuppressWarnings({ "rawtypes", "unchecked" })
    CacheListener<ByteArrayWrapper, ByteArrayWrapper> cl = new CacheListenerAdapter() {
        @Override
        public void afterCreate(EntryEvent event) {
            System.out.println("Created: " + event.getKey() + " = " + event.getNewValue());
        }

        @Override
        public void afterUpdate(EntryEvent event) {
            System.out.println("Updated: " + event.getKey() + " replacing " + event.getOldValue() + "with" + event.getNewValue());
        }
    };

    Region<ByteArrayWrapper, ByteArrayWrapper> region = cache
        .<ByteArrayWrapper, ByteArrayWrapper> createClientRegionFactory(ClientRegionShortcut.CACHING_PROXY)
        .addCacheListener(cl)
        .setKeyConstraint(ByteArrayWrapper.class)
        .setValueConstraint(ByteArrayWrapper.class)
        .create(GeodeRedisServer.STRING_REGION);

    RedisClient client = RedisClient.create("redis://" + HOST);
    StatefulRedisConnection<String, String> connection = client.connect();
    RedisAsyncCommands<String, String> cmd = connection.async();

    cmd.set("1", "HelloGeodeRedis").get();
    cmd.set("2", "WorldGeodeRedis" + System.currentTimeMillis()).get();

    System.out.println("FromRedis: " + cmd.get("2").get());
    System.out.println("FromGeode: " + region.get(Coder.stringToByteArrayWrapper("2")));

    for (Map.Entry<?, ?> entry : region.entrySet()) {
        System.out.format("key = %s, value = %s\n", entry.getKey(), entry.getValue());
    }

    cache.close();
}

我想知道 50% 的事情是否与我正在运行的服务器有关:

gfsh>describe region --name=ReDiS_StRiNgS
..........................................................
Name            : ReDiS_StRiNgS
Data Policy     : persistent partition
Hosting Members : my-redis

Non-Default Attributes Shared By Hosting Members

 Type  |    Name     | Value
------ | ----------- | --------------------
Region | size        | 2
       | data-policy | PERSISTENT_PARTITION

gfsh>describe region --name my-region
..........................................................
Name            : my-region
Data Policy     : persistent replicate
Hosting Members : my-server
                  my-redis

Non-Default Attributes Shared By Hosting Members

 Type  |    Name     | Value
------ | ----------- | --------------------
Region | data-policy | PERSISTENT_REPLICATE
       | size        | 2
       | scope       | distributed-ack

gfsh>list members
      Name       | Id
---------------- | -----------------------------------------------------------
my-locator | 172.16.202.245(my-locator:21234:locator)<ec><v0>:1024
my-server  | 172.16.202.245(my-server:22154)<v1>:1025
my-redis   | 172.16.202.245(my-redis:24890)<v2>:1026

如您所见，我手动创建的区域由两台服务器托管，而由 redis 创建的区域仅由 redis 服务器托管。

我有 50% 的时间遇到​​的错误如下:

org.apache.geode.cache.client.ServerOperationException: remote server on My-Computer(4352:loner):64103:58d54999: While performing a remote get
    at org.apache.geode.cache.client.internal.AbstractOp.processObjResponse(AbstractOp.java:285)
    at org.apache.geode.cache.client.internal.GetOp$GetOpImpl.processResponse(GetOp.java:143)
    at org.apache.geode.cache.client.internal.AbstractOp.attemptReadResponse(AbstractOp.java:171)
    at org.apache.geode.cache.client.internal.AbstractOp.attempt(AbstractOp.java:382)
    at org.apache.geode.cache.client.internal.ConnectionImpl.execute(ConnectionImpl.java:275)
    at org.apache.geode.cache.client.internal.pooling.PooledConnection.execute(PooledConnection.java:332)
    at org.apache.geode.cache.client.internal.OpExecutorImpl.executeWithPossibleReAuthentication(OpExecutorImpl.java:900)
    at org.apache.geode.cache.client.internal.OpExecutorImpl.execute(OpExecutorImpl.java:158)
    at org.apache.geode.cache.client.internal.OpExecutorImpl.execute(OpExecutorImpl.java:115)
    at org.apache.geode.cache.client.internal.PoolImpl.execute(PoolImpl.java:763)
    at org.apache.geode.cache.client.internal.GetOp.execute(GetOp.java:91)
    at org.apache.geode.cache.client.internal.ServerRegionProxy.get(ServerRegionProxy.java:116)
    at org.apache.geode.internal.cache.LocalRegion.findObjectInSystem(LocalRegion.java:2776)
    at org.apache.geode.internal.cache.LocalRegion.nonTxnFindObject(LocalRegion.java:1488)
    at org.apache.geode.internal.cache.LocalRegionDataView.findObject(LocalRegionDataView.java:175)
    at org.apache.geode.internal.cache.LocalRegion.get(LocalRegion.java:1377)
    at org.apache.geode.internal.cache.LocalRegion.get(LocalRegion.java:1310)
    at org.apache.geode.internal.cache.LocalRegion.get(LocalRegion.java:1295)
    at org.apache.geode.internal.cache.AbstractRegion.get(AbstractRegion.java:320)
    at trial.GeodeTest.test_subscribe(GeodeTest.java:112)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: org.apache.geode.cache.RegionDestroyedException: Server connection from [identity(192.168.64.106(4352:loner):64103:58d54999,connection=1; port=64103]: Region named /ReDiS_StRiNgS/ReDiS_StRiNgS was not found during get request
    at org.apache.geode.internal.cache.tier.sockets.BaseCommand.writeRegionDestroyedEx(BaseCommand.java:615)
    at org.apache.geode.internal.cache.tier.sockets.command.Get70.cmdExecute(Get70.java:126)
    at org.apache.geode.internal.cache.tier.sockets.BaseCommand.execute(BaseCommand.java:165)
    at org.apache.geode.internal.cache.tier.sockets.ServerConnection.doNormalMsg(ServerConnection.java:780)
    at org.apache.geode.internal.cache.tier.sockets.ServerConnection.doOneMessage(ServerConnection.java:911)
    at org.apache.geode.internal.cache.tier.sockets.ServerConnection.run(ServerConnection.java:1166)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.geode.internal.cache.tier.sockets.AcceptorImpl$1$1.run(AcceptorImpl.java:523)
    at java.lang.Thread.run(Thread.java:745)

所以你有完整的免责声明，我测试这个的原因是我想使用 kafka-connect-redis 将来自 kafka 主题的数据放入 geode 中。避免自己编写 geode kafka 连接器。

编辑:由于@Swapnil，50% 的问题已得到解决，但现在我又遇到了使 entrySet 和事件通知工作的问题。似乎除非我强行获取我使用 redis 客户端放置的 key ，否则我不会收到任何 EntryEvent 通知。

最佳答案

我没有收到事件的问题是因为我没有对我感兴趣的键感兴趣。

添加 region.registerInterestRegex(".*"); 允许标记对每个键的兴趣。它需要使用 .setPoolSubscriptionEnabled(true) 设置 ClientCache。

    ClientCache cache = new ClientCacheFactory()
        .addPoolLocator(HOST, LOCATOR_PORT)
        .setPoolSubscriptionEnabled(true)
        .create();

    // ...

    Region<ByteArrayWrapper, ByteArrayWrapper> region = cache
        .<ByteArrayWrapper, ByteArrayWrapper> createClientRegionFactory(ClientRegionShortcut.CACHING_PROXY)
        .addCacheListener(cl)
        .setKeyConstraint(ByteArrayWrapper.class)
        .setValueConstraint(ByteArrayWrapper.class)
        .create(GeodeRedisServer.STRING_REGION);

    region.registerInterestRegex(".*");

    // ...

关于java - 如何使用 Redis 适配器写入 Geode，然后使用 Geode 客户端读取/响应事件？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45420357/

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