pl.allegro.tech.hermes.test.helper.zookeeper.ZookeeperBaseTest Maven / Gradle / Ivy

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package pl.allegro.tech.hermes.test.helper.zookeeper;

import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.retry.ExponentialBackoffRetry;
import org.apache.curator.test.TestingServer;
import org.junit.AfterClass;
import org.junit.BeforeClass;

@SuppressFBWarnings("MS_PKGPROTECT")
public abstract class ZookeeperBaseTest {

  protected static TestingServer zookeeperServer;

  protected static CuratorFramework zookeeperClient;

  protected static ZookeeperWaiter wait;

  protected ZookeeperBaseTest() {}

  @BeforeClass
  public static void beforeZookeeperClass() throws Exception {
    zookeeperServer = new TestingServer(45678);
    zookeeperClient =
        CuratorFrameworkFactory.builder()
            .connectString(zookeeperServer.getConnectString())
            .retryPolicy(new ExponentialBackoffRetry(1000, 3))
            .build();
    zookeeperClient.start();
    wait = new ZookeeperWaiter(zookeeperClient);

    wait.untilZookeeperClientStarted();
  }

  protected static CuratorFramework newClient() {
    CuratorFramework newClient =
        CuratorFrameworkFactory.builder()
            .connectString(zookeeperServer.getConnectString())
            .retryPolicy(new ExponentialBackoffRetry(1000, 3))
            .build();
    newClient.start();
    wait.untilZookeeperClientStarted(newClient);
    return newClient;
  }

  @AfterClass
  public static void tearDown() throws Exception {
    zookeeperServer.stop();
  }

  protected void createPath(String path) throws Exception {
    if (zookeeperClient.checkExists().forPath(path) == null) {
      zookeeperClient.create().creatingParentsIfNeeded().forPath(path);
    }
  }

  protected void deleteData(String path) throws Exception {
    if (zookeeperClient.checkExists().forPath(path) != null) {
      zookeeperClient.delete().deletingChildrenIfNeeded().forPath(path);
    }
  }

  protected void deleteAllNodes() throws Exception {
    if (zookeeperClient.checkExists().forPath("/hermes") != null) {
      zookeeperClient.delete().guaranteed().deletingChildrenIfNeeded().forPath("/hermes");
    }
  }
}