Examples of org.restlet.Client

org.restlet.Client
Connector acting as a generic client. It internally uses one of the available connector helpers registered with the Restlet engine.

Concurrency note: instances of this class or its subclasses can be invoked by several threads at the same time and therefore must be thread-safe. You should be especially careful when storing state in member variables.

For advanced cases, it is possible to obtained the wrapped {@link RestletHelper} instance that is used by this client to handle thecalls via the "org.restlet.engine.helper" attribute stored in the {@link Context} object. @author Jerome Louvel


    Request request = new Request(Method.POST, resourceRef);
    request.setEntity(JsonParameters.JSON_PARAMETERS + "="
                          + ClusterRepresentationUtil.ObjectToJson(jsonParameters),
                      MediaType.APPLICATION_ALL);
    Client client = new Client(Protocol.HTTP);
    Response response = client.handle(request);
    Representation result = response.getEntity();
    StringWriter sw = new StringWriter();
    result.write(sw);


    Assert.assertTrue(response.getStatus().getCode() == Status.SUCCESS_OK.getCode());

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    for (String key : extraForm.keySet())
    {
      entity = entity + "&" + (key + "=" + extraForm.get(key));
    }
    request.setEntity(entity, MediaType.APPLICATION_ALL);
    Client client = new Client(Protocol.HTTP);
    Response response = client.handle(request);
    Representation result = response.getEntity();
    StringWriter sw = new StringWriter();
    result.write(sw);


    Assert.assertTrue(response.getStatus().getCode() == Status.SUCCESS_OK.getCode());

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  void deleteUrl(String url, boolean hasException) throws IOException
  {
    Reference resourceRef = new Reference(url);
    Request request = new Request(Method.DELETE, resourceRef);
    Client client = new Client(Protocol.HTTP);
    Response response = client.handle(request);
    Representation result = response.getEntity();
    StringWriter sw = new StringWriter();
    result.write(sw);
    Assert.assertTrue(hasException == sw.toString().toLowerCase().contains("exception"));
  }

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  String getUrl(String url) throws IOException
  {
    Reference resourceRef = new Reference(url);
    Request request = new Request(Method.GET, resourceRef);
    Client client = new Client(Protocol.HTTP);
    Response response = client.handle(request);
    Representation result = response.getEntity();
    StringWriter sw = new StringWriter();
    result.write(sw);
    return sw.toString();
  }

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    String httpUrlBase =
        "http://localhost:" + ADMIN_PORT + "/clusters/" + clusterName
            + "/StateModelDefs/MasterSlave";
    Reference resourceRef = new Reference(httpUrlBase);
    Request request = new Request(Method.GET, resourceRef);
    Client client = new Client(Protocol.HTTP);
    Response response = client.handle(request);
    Representation result = response.getEntity();
    StringWriter sw = new StringWriter();
    result.write(sw);
    ObjectMapper mapper = new ObjectMapper();
    ZNRecord zn = mapper.readValue(new StringReader(sw.toString()), ZNRecord.class);


    Map<String, String> paraMap = new HashMap<String, String>();


    paraMap.put(JsonParameters.MANAGEMENT_COMMAND,
                ClusterSetup.addStateModelDef);


    ZNRecord r = new ZNRecord("Test");
    r.merge(zn);
    StateModelDefinition newStateModel = new StateModelDefinition(r);


    httpUrlBase =
        "http://localhost:" + ADMIN_PORT + "/clusters/" + clusterName + "/StateModelDefs";
    resourceRef = new Reference(httpUrlBase);
    request = new Request(Method.POST, resourceRef);
    request.setEntity(JsonParameters.JSON_PARAMETERS + "="
                          + ClusterRepresentationUtil.ObjectToJson(paraMap) + "&"
                          + JsonParameters.NEW_STATE_MODEL_DEF + "="
                          + ClusterRepresentationUtil.ZNRecordToJson(r),
                      MediaType.APPLICATION_ALL);
    client = new Client(Protocol.HTTP);
    response = client.handle(request);


    result = response.getEntity();
    sw = new StringWriter();
    result.write(sw);

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    Request request = new Request(Method.POST, resourceRef);


    request.setEntity(JsonParameters.JSON_PARAMETERS + "="
        + ClusterRepresentationUtil.ObjectToJson(paraMap), MediaType.APPLICATION_ALL);
    Client client = new Client(Protocol.HTTP);
    Response response = client.handle(request);


    Representation result = response.getEntity();
    StringWriter sw = new StringWriter();
    result.write(sw);

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    _maxConcurrentTasks = maxConcurrentTasks;
    _executorService = Executors.newFixedThreadPool(_maxConcurrentTasks);
    _clients = new Client[_maxConcurrentTasks];
    for(int i = 0; i< _clients.length; i++)
    {
      _clients[i] = new Client(Protocol.HTTP);
    }
    _timer = new Timer(true);
    _timer.schedule(new SendZNRecordTimerTask(), SEND_PERIOD, SEND_PERIOD);
    _dataBufferRef.getAndSet(new ConcurrentHashMap<String, ZNRecordUpdate>());
  }

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    Request request = new Request(Method.POST, resourceRef);


    request.setEntity(JsonParameters.JSON_PARAMETERS + "="
        + ClusterRepresentationUtil.ObjectToJson(paraMap), MediaType.APPLICATION_ALL);
    Client client = new Client(Protocol.HTTP);
    Response response = client.handle(request);


    Representation result = response.getEntity();
    StringWriter sw = new StringWriter();
    result.write(sw);


    System.out.println(sw.toString());


    ObjectMapper mapper = new ObjectMapper();
    ZNRecord zn = mapper.readValue(new StringReader(sw.toString()), ZNRecord.class);
    AssertJUnit.assertTrue(zn.getListField("ResourceGroups").contains(resourceGroupName));


    httpUrlBase =
        "http://localhost:" + ADMIN_PORT + "/clusters/" + clusterName + "/resourceGroups/"
            + resourceGroupName;
    resourceRef = new Reference(httpUrlBase);


    request = new Request(Method.GET, resourceRef);


    client = new Client(Protocol.HTTP);
    response = client.handle(request);


    result = response.getEntity();
    sw = new StringWriter();
    result.write(sw);

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    Request request = new Request(Method.POST, resourceRef);


    request.setEntity(JsonParameters.JSON_PARAMETERS + "="
        + ClusterRepresentationUtil.ObjectToJson(paraMap), MediaType.APPLICATION_ALL);
    Client client = new Client(Protocol.HTTP);
    Response response = client.handle(request);


    Representation result = response.getEntity();
    StringWriter sw = new StringWriter();
    result.write(sw);


    System.out.println(sw.toString());


    ObjectMapper mapper = new ObjectMapper();


    TypeReference<ArrayList<ZNRecord>> typeRef = new TypeReference<ArrayList<ZNRecord>>()
    {
    };
    List<ZNRecord> znList = mapper.readValue(new StringReader(sw.toString()), typeRef);
    AssertJUnit.assertTrue(znList.get(0).getId().equals(instance1 + "_" + instancePort));


    // the case to add more than 1 instances
    paraMap.clear();
    paraMap.put(JsonParameters.MANAGEMENT_COMMAND, ClusterSetup.addInstance);


    String[] instances = { "test2", "test3", "test4", "test5" };


    String instanceNames = "";
    boolean first = true;
    for (String instance : instances)
    {
      if (first == true)
      {
        first = false;
      }
      else
      {
        instanceNames += ";";
      }
      instanceNames += (instance + ":" + instancePort);
    }
    paraMap.put(JsonParameters.INSTANCE_NAMES, instanceNames);


    request = new Request(Method.POST, resourceRef);


    request.setEntity(JsonParameters.JSON_PARAMETERS + "="
        + ClusterRepresentationUtil.ObjectToJson(paraMap), MediaType.APPLICATION_ALL);
    client = new Client(Protocol.HTTP);
    response = client.handle(request);


    result = response.getEntity();
    sw = new StringWriter();
    result.write(sw);

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    Request request = new Request(Method.POST, resourceRef);


    request.setEntity(JsonParameters.JSON_PARAMETERS + "="
        + ClusterRepresentationUtil.ObjectToJson(paraMap), MediaType.APPLICATION_ALL);
    Client client = new Client(Protocol.HTTP);
    Response response = client.handle(request);


    Representation result = response.getEntity();
    StringWriter sw = new StringWriter();
    result.write(sw);


    System.out.println(sw.toString());


    ObjectMapper mapper = new ObjectMapper();
    ZNRecord r = mapper.readValue(new StringReader(sw.toString()), ZNRecord.class);


    for (int i = 0; i < partitions; i++)
    {
      String partitionName = resourceGroupName + "_" + i;
      assert (r.getMapField(partitionName).size() == replicas);
    }


    httpUrlBase = "http://localhost:" + ADMIN_PORT + "/clusters/" + clusterName;
    resourceRef = new Reference(httpUrlBase);
    request = new Request(Method.GET, resourceRef);


    client = new Client(Protocol.HTTP);
    response = client.handle(request);


    result = response.getEntity();
    sw = new StringWriter();
    result.write(sw);

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