Example usage for org.apache.zookeeper CreateMode isEphemeral

Introduction

In this page you can find the example usage for org.apache.zookeeper CreateMode isEphemeral.

Prototype

public boolean isEphemeral() 

Source Link

Usage

From source file:org.apache.curator.framework.schema.Schema.java

License:Apache License

/**
 * Validate that this schema's create mode setting matches and that the data is valid
 *
 * @param mode CreateMode being used// w ww .  j a  va  2  s  .c  om
 * @param path the znode full path
 * @param data data being set
 * @param acl the creation acls
 * @throws SchemaViolation if schema's create mode setting does not match or data is invalid
 */
public void validateCreate(CreateMode mode, String path, byte[] data, List<ACL> acl) {
    if (mode.isEphemeral() && (ephemeral == Allowance.CANNOT)) {
        throw new SchemaViolation(this, new SchemaViolation.ViolatorData(path, data, acl),
                "Cannot be ephemeral");
    }

    if (!mode.isEphemeral() && (ephemeral == Allowance.MUST)) {
        throw new SchemaViolation(this, new SchemaViolation.ViolatorData(path, data, acl), "Must be ephemeral");
    }

    if (mode.isSequential() && (sequential == Allowance.CANNOT)) {
        throw new SchemaViolation(this, new SchemaViolation.ViolatorData(path, data, acl),
                "Cannot be sequential");
    }

    if (!mode.isSequential() && (sequential == Allowance.MUST)) {
        throw new SchemaViolation(this, new SchemaViolation.ViolatorData(path, data, acl),
                "Must be sequential");
    }

    validateGeneral(path, data, acl);
}

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From source file:org.apache.flink.runtime.zookeeper.ZooKeeperStateHandleStoreITCase.java

License:Apache License

/**
 * Tests that {@link CreateMode} is respected.
 *///from  w  w  w.j  a  v a  2  s  .c  om
@Test
public void testAddWithCreateMode() throws Exception {
    LongStateStorage longStateStorage = new LongStateStorage();
    ZooKeeperStateHandleStore<Long> store = new ZooKeeperStateHandleStore<Long>(ZooKeeper.getClient(),
            longStateStorage);

    // Config
    Long state = 3457347234L;

    CreateMode[] modes = CreateMode.values();
    for (int i = 0; i < modes.length; i++) {
        CreateMode mode = modes[i];
        state += i;

        String pathInZooKeeper = "/testAddWithCreateMode" + mode.name();

        // Test
        store.add(pathInZooKeeper, state, mode);

        if (mode.isSequential()) {
            // Figure out the sequential ID
            List<String> paths = ZooKeeper.getClient().getChildren().forPath("/");
            for (String p : paths) {
                if (p.startsWith("testAddWithCreateMode" + mode.name())) {
                    pathInZooKeeper = "/" + p;
                    break;
                }
            }
        }

        // Verify
        // State handle created
        assertEquals(i + 1, store.getAll().size());
        assertEquals(state, longStateStorage.getStateHandles().get(i).getState(null));

        // Path created
        Stat stat = ZooKeeper.getClient().checkExists().forPath(pathInZooKeeper);

        assertNotNull(stat);

        // Is ephemeral or persistent
        if (mode.isEphemeral()) {
            assertTrue(stat.getEphemeralOwner() != 0);
        } else {
            assertEquals(0, stat.getEphemeralOwner());
        }

        // Data is equal
        @SuppressWarnings("unchecked")
        Long actual = ((StateHandle<Long>) InstantiationUtil.deserializeObject(
                ZooKeeper.getClient().getData().forPath(pathInZooKeeper), ClassLoader.getSystemClassLoader()))
                        .getState(null);

        assertEquals(state, actual);
    }
}

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