diff --git a/apache-curator/pom.xml b/apache-curator/pom.xml new file mode 100644 index 0000000000..36c3949b1a --- /dev/null +++ b/apache-curator/pom.xml @@ -0,0 +1,68 @@ + + 4.0.0 + apache-curator + 0.0.1-SNAPSHOT + jar + + + com.baeldung + parent-modules + 1.0.0-SNAPSHOT + + + + 4.0.1 + 3.4.11 + 2.9.4 + + + 3.6.1 + + + + + + + + + org.apache.curator + curator-x-async + ${curator.version} + + + org.apache.zookeeper + zookeeper + + + + + + org.apache.curator + curator-recipes + ${curator.version} + + + + org.apache.zookeeper + zookeeper + ${zookeeper.version} + + + + + com.fasterxml.jackson.core + jackson-databind + ${jackson-databind.version} + + + + + + org.assertj + assertj-core + ${assertj.version} + test + + + diff --git a/apache-curator/src/main/java/com/baeldung/apache/curator/modeled/HostConfig.java b/apache-curator/src/main/java/com/baeldung/apache/curator/modeled/HostConfig.java new file mode 100644 index 0000000000..bab7133742 --- /dev/null +++ b/apache-curator/src/main/java/com/baeldung/apache/curator/modeled/HostConfig.java @@ -0,0 +1,31 @@ +package com.baeldung.apache.curator.modeled; + +public class HostConfig { + private String hostname; + private int port; + + public HostConfig() { + + } + + public HostConfig(String hostname, int port) { + this.hostname = hostname; + this.port = port; + } + + public int getPort() { + return port; + } + + public void setPort(int port) { + this.port = port; + } + + public String getHostname() { + return hostname; + } + + public void setHostname(String hostname) { + this.hostname = hostname; + } +} diff --git a/apache-curator/src/test/java/com/baeldung/apache/curator/BaseTest.java b/apache-curator/src/test/java/com/baeldung/apache/curator/BaseTest.java new file mode 100644 index 0000000000..cfac3ee3f2 --- /dev/null +++ b/apache-curator/src/test/java/com/baeldung/apache/curator/BaseTest.java @@ -0,0 +1,22 @@ +package com.baeldung.apache.curator; + +import org.apache.curator.RetryPolicy; +import org.apache.curator.framework.CuratorFramework; +import org.apache.curator.framework.CuratorFrameworkFactory; +import org.apache.curator.retry.RetryNTimes; +import org.junit.Before; + +public abstract class BaseTest { + + @Before + public void setup() { + org.apache.log4j.BasicConfigurator.configure(); + } + + protected CuratorFramework newClient() { + int sleepMsBetweenRetries = 100; + int maxRetries = 3; + RetryPolicy retryPolicy = new RetryNTimes(maxRetries, sleepMsBetweenRetries); + return CuratorFrameworkFactory.newClient("127.0.0.1:2181", retryPolicy); + } +} diff --git a/apache-curator/src/test/java/com/baeldung/apache/curator/configuration/ConfigurationManagementManualTest.java b/apache-curator/src/test/java/com/baeldung/apache/curator/configuration/ConfigurationManagementManualTest.java new file mode 100644 index 0000000000..0475f9c237 --- /dev/null +++ b/apache-curator/src/test/java/com/baeldung/apache/curator/configuration/ConfigurationManagementManualTest.java @@ -0,0 +1,98 @@ +package com.baeldung.apache.curator.configuration; + +import static org.assertj.core.api.Assertions.assertThat; + +import java.util.ArrayList; +import java.util.List; +import java.util.UUID; +import java.util.concurrent.atomic.AtomicBoolean; + +import org.apache.curator.framework.CuratorFramework; +import org.apache.curator.x.async.AsyncCuratorFramework; +import org.junit.Test; + +import com.baeldung.apache.curator.BaseTest; + +public class ConfigurationManagementManualTest extends BaseTest { + + private static final String KEY_FORMAT = "/%s"; + + @Test + public void givenPath_whenCreateKey_thenValueIsStored() throws Exception { + try (CuratorFramework client = newClient()) { + client.start(); + AsyncCuratorFramework async = AsyncCuratorFramework.wrap(client); + String key = getKey(); + String expected = "my_value"; + + // Create key nodes structure + client + .create() + .forPath(key); + + // Set data value for our key + async + .setData() + .forPath(key, expected.getBytes()); + + // Get data value + AtomicBoolean isEquals = new AtomicBoolean(); + async + .getData() + .forPath(key) + .thenAccept(data -> isEquals.set(new String(data).equals(expected))); + + Thread.sleep(1000); + + assertThat(isEquals.get()).isTrue(); + } + } + + @Test + public void givenPath_whenWatchAKeyAndStoreAValue_thenWatcherIsTriggered() throws Exception { + try (CuratorFramework client = newClient()) { + client.start(); + AsyncCuratorFramework async = AsyncCuratorFramework.wrap(client); + String key = getKey(); + String expected = "my_value"; + + // Create key structure + async + .create() + .forPath(key); + + List changes = new ArrayList<>(); + + // Watch data value + async + .watched() + .getData() + .forPath(key) + .event() + .thenAccept(watchedEvent -> { + try { + changes.add(new String(client + .getData() + .forPath(watchedEvent.getPath()))); + } catch (Exception e) { + // fail ... + } + }); + + // Set data value for our key + async + .setData() + .forPath(key, expected.getBytes()); + + Thread.sleep(1000); + + assertThat(changes.size() > 0).isTrue(); + } + } + + private String getKey() { + return String.format(KEY_FORMAT, UUID + .randomUUID() + .toString()); + } +} diff --git a/apache-curator/src/test/java/com/baeldung/apache/curator/connection/ConnectionManagementManualTest.java b/apache-curator/src/test/java/com/baeldung/apache/curator/connection/ConnectionManagementManualTest.java new file mode 100644 index 0000000000..931a977900 --- /dev/null +++ b/apache-curator/src/test/java/com/baeldung/apache/curator/connection/ConnectionManagementManualTest.java @@ -0,0 +1,69 @@ +package com.baeldung.apache.curator.connection; + +import static org.assertj.core.api.Assertions.assertThat; + +import java.util.concurrent.atomic.AtomicBoolean; + +import org.apache.curator.RetryPolicy; +import org.apache.curator.framework.CuratorFramework; +import org.apache.curator.framework.CuratorFrameworkFactory; +import org.apache.curator.retry.RetryNTimes; +import org.apache.curator.x.async.AsyncCuratorFramework; +import org.junit.Test; + +public class ConnectionManagementManualTest { + + @Test + public void givenRunningZookeeper_whenOpenConnection_thenClientIsOpened() throws Exception { + int sleepMsBetweenRetries = 100; + int maxRetries = 3; + RetryPolicy retryPolicy = new RetryNTimes(maxRetries, sleepMsBetweenRetries); + + try (CuratorFramework client = CuratorFrameworkFactory.newClient("127.0.0.1:2181", retryPolicy)) { + client.start(); + assertThat(client + .checkExists() + .forPath("/")).isNotNull(); + } + } + + @Test + public void givenRunningZookeeper_whenOpenConnectionUsingAsyncNotBlocking_thenClientIsOpened() throws InterruptedException { + int sleepMsBetweenRetries = 100; + int maxRetries = 3; + RetryPolicy retryPolicy = new RetryNTimes(maxRetries, sleepMsBetweenRetries); + + try (CuratorFramework client = CuratorFrameworkFactory.newClient("127.0.0.1:2181", retryPolicy)) { + client.start(); + AsyncCuratorFramework async = AsyncCuratorFramework.wrap(client); + + AtomicBoolean exists = new AtomicBoolean(false); + async + .checkExists() + .forPath("/") + .thenAcceptAsync(s -> exists.set(s != null)); + Thread.sleep(100); + assertThat(exists.get()).isTrue(); + } + } + + @Test + public void givenRunningZookeeper_whenOpenConnectionUsingAsyncBlocking_thenClientIsOpened() throws InterruptedException { + int sleepMsBetweenRetries = 100; + int maxRetries = 3; + RetryPolicy retryPolicy = new RetryNTimes(maxRetries, sleepMsBetweenRetries); + + try (CuratorFramework client = CuratorFrameworkFactory.newClient("127.0.0.1:2181", retryPolicy)) { + client.start(); + AsyncCuratorFramework async = AsyncCuratorFramework.wrap(client); + + AtomicBoolean exists = new AtomicBoolean(false); + async + .checkExists() + .forPath("/") + .thenAccept(s -> exists.set(s != null)); + Thread.sleep(100); + assertThat(exists.get()).isTrue(); + } + } +} diff --git a/apache-curator/src/test/java/com/baeldung/apache/curator/modeled/ModelTypedExamplesManualTest.java b/apache-curator/src/test/java/com/baeldung/apache/curator/modeled/ModelTypedExamplesManualTest.java new file mode 100644 index 0000000000..9d00c0a4c2 --- /dev/null +++ b/apache-curator/src/test/java/com/baeldung/apache/curator/modeled/ModelTypedExamplesManualTest.java @@ -0,0 +1,47 @@ +package com.baeldung.apache.curator.modeled; + +import static org.assertj.core.api.Assertions.assertThat; +import static org.assertj.core.api.Assertions.fail; + +import org.apache.curator.framework.CuratorFramework; +import org.apache.curator.x.async.AsyncCuratorFramework; +import org.apache.curator.x.async.modeled.JacksonModelSerializer; +import org.apache.curator.x.async.modeled.ModelSpec; +import org.apache.curator.x.async.modeled.ModeledFramework; +import org.apache.curator.x.async.modeled.ZPath; +import org.junit.Test; + +import com.baeldung.apache.curator.BaseTest; + +public class ModelTypedExamplesManualTest extends BaseTest { + + @Test + public void givenPath_whenStoreAModel_thenNodesAreCreated() throws InterruptedException { + + ModelSpec mySpec = ModelSpec + .builder(ZPath.parseWithIds("/config/dev"), JacksonModelSerializer.build(HostConfig.class)) + .build(); + + try (CuratorFramework client = newClient()) { + client.start(); + AsyncCuratorFramework async = AsyncCuratorFramework.wrap(client); + ModeledFramework modeledClient = ModeledFramework.wrap(async, mySpec); + + modeledClient.set(new HostConfig("host-name", 8080)); + + modeledClient + .read() + .whenComplete((value, e) -> { + if (e != null) { + fail("Cannot read host config", e); + } else { + assertThat(value).isNotNull(); + assertThat(value.getHostname()).isEqualTo("host-name"); + assertThat(value.getPort()).isEqualTo(8080); + } + + }); + } + + } +} diff --git a/apache-curator/src/test/java/com/baeldung/apache/curator/recipes/RecipesManualTest.java b/apache-curator/src/test/java/com/baeldung/apache/curator/recipes/RecipesManualTest.java new file mode 100644 index 0000000000..04f4104e6b --- /dev/null +++ b/apache-curator/src/test/java/com/baeldung/apache/curator/recipes/RecipesManualTest.java @@ -0,0 +1,74 @@ +package com.baeldung.apache.curator.recipes; + +import static org.assertj.core.api.Assertions.assertThat; + +import org.apache.curator.framework.CuratorFramework; +import org.apache.curator.framework.recipes.leader.LeaderSelector; +import org.apache.curator.framework.recipes.leader.LeaderSelectorListener; +import org.apache.curator.framework.recipes.locks.InterProcessSemaphoreMutex; +import org.apache.curator.framework.recipes.shared.SharedCount; +import org.apache.curator.framework.state.ConnectionState; +import org.junit.Test; + +import com.baeldung.apache.curator.BaseTest; + +public class RecipesManualTest extends BaseTest { + + @Test + public void givenRunningZookeeper_whenUsingLeaderElection_thenNoErrors() { + try (CuratorFramework client = newClient()) { + client.start(); + LeaderSelector leaderSelector = new LeaderSelector(client, "/mutex/select/leader/for/job/A", new LeaderSelectorListener() { + + @Override + public void stateChanged(CuratorFramework client, ConnectionState newState) { + + } + + @Override + public void takeLeadership(CuratorFramework client) throws Exception { + // I'm the leader of the job A ! + } + + }); + + leaderSelector.start(); + + // Wait until the job A is done among all the members + + leaderSelector.close(); + } + } + + @Test + public void givenRunningZookeeper_whenUsingSharedLock_thenNoErrors() throws Exception { + try (CuratorFramework client = newClient()) { + client.start(); + InterProcessSemaphoreMutex sharedLock = new InterProcessSemaphoreMutex(client, "/mutex/process/A"); + + sharedLock.acquire(); + + // Do process A + + sharedLock.release(); + } + } + + @Test + public void givenRunningZookeeper_whenUsingSharedCounter_thenCounterIsIncrement() throws Exception { + try (CuratorFramework client = newClient()) { + client.start(); + + try (SharedCount counter = new SharedCount(client, "/counters/A", 0)) { + counter.start(); + + counter.setCount(0); + counter.setCount(counter.getCount() + 1); + + assertThat(counter.getCount()).isEqualTo(1); + } + + } + } + +} diff --git a/pom.xml b/pom.xml index 75cf4b84b8..23f14a56a4 100644 --- a/pom.xml +++ b/pom.xml @@ -39,6 +39,7 @@ apache-fop apache-poi apache-thrift + apache-curator autovalue axon bootique