Examples with CreateMode org.apache.zookeeper.CreateMode used on opensource projects

Example 11 with CreateMode

use of org.apache.zookeeper.CreateMode in project zookeeper by apache.

the class InstanceContainer method mknod.

private void mknod(String path, CreateMode mode) throws KeeperException, InterruptedException {
    String[] subpath = path.split("/");
    StringBuilder sb = new StringBuilder();
    // We start at 1 because / will create an empty part first
    for (int i = 1; i < subpath.length; i++) {
        sb.append("/");
        sb.append(subpath[i]);
        CreateMode m = CreateMode.PERSISTENT;
        if (i == subpath.length - 1) {
            m = mode;
        }
        mknod_inner(sb.toString(), m);
    }
}

Example 12 with CreateMode

use of org.apache.zookeeper.CreateMode in project zookeeper by apache.

the class CreateModeTest method testBasicCreateMode.

@Test
public void testBasicCreateMode() {
    CreateMode cm = CreateMode.PERSISTENT;
    Assert.assertEquals(cm.toFlag(), 0);
    Assert.assertFalse(cm.isEphemeral());
    Assert.assertFalse(cm.isSequential());
    Assert.assertFalse(cm.isContainer());
    cm = CreateMode.EPHEMERAL;
    Assert.assertEquals(cm.toFlag(), 1);
    Assert.assertTrue(cm.isEphemeral());
    Assert.assertFalse(cm.isSequential());
    Assert.assertFalse(cm.isContainer());
    cm = CreateMode.PERSISTENT_SEQUENTIAL;
    Assert.assertEquals(cm.toFlag(), 2);
    Assert.assertFalse(cm.isEphemeral());
    Assert.assertTrue(cm.isSequential());
    Assert.assertFalse(cm.isContainer());
    cm = CreateMode.EPHEMERAL_SEQUENTIAL;
    Assert.assertEquals(cm.toFlag(), 3);
    Assert.assertTrue(cm.isEphemeral());
    Assert.assertTrue(cm.isSequential());
    Assert.assertFalse(cm.isContainer());
    cm = CreateMode.CONTAINER;
    Assert.assertEquals(cm.toFlag(), 4);
    Assert.assertFalse(cm.isEphemeral());
    Assert.assertFalse(cm.isSequential());
    Assert.assertTrue(cm.isContainer());
}

Example 13 with CreateMode

use of org.apache.zookeeper.CreateMode in project zookeeper by apache.

the class PrepRequestProcessor method pRequest2TxnCreate.

private void pRequest2TxnCreate(int type, Request request, Record record, boolean deserialize) throws IOException, KeeperException {
    if (deserialize) {
        ByteBufferInputStream.byteBuffer2Record(request.request, record);
    }
    int flags;
    String path;
    List<ACL> acl;
    byte[] data;
    long ttl;
    if (type == OpCode.createTTL) {
        CreateTTLRequest createTtlRequest = (CreateTTLRequest) record;
        flags = createTtlRequest.getFlags();
        path = createTtlRequest.getPath();
        acl = createTtlRequest.getAcl();
        data = createTtlRequest.getData();
        ttl = createTtlRequest.getTtl();
    } else {
        CreateRequest createRequest = (CreateRequest) record;
        flags = createRequest.getFlags();
        path = createRequest.getPath();
        acl = createRequest.getAcl();
        data = createRequest.getData();
        ttl = 0;
    }
    CreateMode createMode = CreateMode.fromFlag(flags);
    validateCreateRequest(createMode, request);
    String parentPath = validatePathForCreate(path, request.sessionId);
    List<ACL> listACL = fixupACL(path, request.authInfo, acl);
    ChangeRecord parentRecord = getRecordForPath(parentPath);
    checkACL(zks, request.cnxn, parentRecord.acl, ZooDefs.Perms.CREATE, request.authInfo, path, listACL);
    int parentCVersion = parentRecord.stat.getCversion();
    if (createMode.isSequential()) {
        path = path + String.format(Locale.ENGLISH, "%010d", parentCVersion);
    }
    validatePath(path, request.sessionId);
    try {
        if (getRecordForPath(path) != null) {
            throw new KeeperException.NodeExistsException(path);
        }
    } catch (KeeperException.NoNodeException e) {
    // ignore this one
    }
    boolean ephemeralParent = EphemeralType.get(parentRecord.stat.getEphemeralOwner()) == EphemeralType.NORMAL;
    if (ephemeralParent) {
        throw new KeeperException.NoChildrenForEphemeralsException(path);
    }
    int newCversion = parentRecord.stat.getCversion() + 1;
    if (type == OpCode.createContainer) {
        request.setTxn(new CreateContainerTxn(path, data, listACL, newCversion));
    } else if (type == OpCode.createTTL) {
        request.setTxn(new CreateTTLTxn(path, data, listACL, newCversion, ttl));
    } else {
        request.setTxn(new CreateTxn(path, data, listACL, createMode.isEphemeral(), newCversion));
    }
    StatPersisted s = new StatPersisted();
    if (createMode.isEphemeral()) {
        s.setEphemeralOwner(request.sessionId);
    }
    parentRecord = parentRecord.duplicate(request.getHdr().getZxid());
    parentRecord.childCount++;
    parentRecord.stat.setCversion(newCversion);
    addChangeRecord(parentRecord);
    addChangeRecord(new ChangeRecord(request.getHdr().getZxid(), path, s, 0, listACL));
}

Example 14 with CreateMode

use of org.apache.zookeeper.CreateMode in project zookeeper by apache.

the class CreateCommand method exec.

@Override
public boolean exec() throws CliException {
    CreateMode flags = CreateMode.PERSISTENT;
    boolean hasE = cl.hasOption("e");
    boolean hasS = cl.hasOption("s");
    boolean hasC = cl.hasOption("c");
    if (hasC && (hasE || hasS)) {
        throw new MalformedCommandException("-c cannot be combined with -s or -e. Containers cannot be ephemeral or sequential.");
    }
    if (hasE && hasS) {
        flags = CreateMode.EPHEMERAL_SEQUENTIAL;
    } else if (hasE) {
        flags = CreateMode.EPHEMERAL;
    } else if (hasS) {
        flags = CreateMode.PERSISTENT_SEQUENTIAL;
    } else if (hasC) {
        flags = CreateMode.CONTAINER;
    }
    String path = args[1];
    byte[] data = null;
    if (args.length > 2) {
        data = args[2].getBytes();
    }
    List<ACL> acl = ZooDefs.Ids.OPEN_ACL_UNSAFE;
    if (args.length > 3) {
        acl = AclParser.parse(args[3]);
    }
    try {
        String newPath = zk.create(path, data, acl, flags);
        err.println("Created " + newPath);
    } catch (KeeperException.EphemeralOnLocalSessionException e) {
        err.println("Unable to create ephemeral node on a local session");
        throw new CliWrapperException(e);
    } catch (KeeperException.InvalidACLException ex) {
        err.println(ex.getMessage());
        throw new CliWrapperException(ex);
    } catch (KeeperException | InterruptedException ex) {
        throw new CliWrapperException(ex);
    }
    return true;
}

Example 15 with CreateMode

use of org.apache.zookeeper.CreateMode in project hadoop by apache.

the class RegistryOperationsService method bind.

@Override
public void bind(String path, ServiceRecord record, int flags) throws IOException {
    Preconditions.checkArgument(record != null, "null record");
    validatePath(path);
    // validate the record before putting it
    RegistryTypeUtils.validateServiceRecord(path, record);
    LOG.info("Bound at {} : {}", path, record);
    CreateMode mode = CreateMode.PERSISTENT;
    byte[] bytes = serviceRecordMarshal.toBytes(record);
    zkSet(path, mode, bytes, getClientAcls(), ((flags & BindFlags.OVERWRITE) != 0));
}