コード例 #1
0
  /**
   * Prints a phrase on the grid nodes running anonymous callable objects and calculating total
   * number of letters.
   *
   * @param phrase Phrase to print on of the grid nodes.
   * @throws GridException If failed.
   */
  private static void countLettersCallable(String phrase) throws GridException {
    X.println(">>> Starting countLettersCallable() example...");

    Collection<Callable<Integer>> calls = new HashSet<Callable<Integer>>();

    for (final String word : phrase.split(" "))
      calls.add(
          new GridCallable<Integer>() { // Create executable logic.
            @Override
            public Integer call() throws Exception {
              // Print out a given word, just so we can
              // see which node is doing what.
              X.println(">>> Executing word: " + word);

              // Return the length of a given word, i.e. number of letters.
              return word.length();
            }
          });

    // Explicitly execute the collection of callable objects and receive a result.
    Collection<Integer> results = G.grid().call(SPREAD, calls);

    // Add up all results using convenience 'sum()' method on GridFunc class.
    int letterCnt = F.sum(results);

    X.println(">>>");
    X.println(
        ">>> Finished execution of counting letters with callables based on GridGain 3.0 API.");
    X.println(">>> You should see the phrase '" + phrase + "' printed out on the nodes.");
    X.println(">>> Total number of letters in the phrase is '" + letterCnt + "'.");
    X.println(">>> Check all nodes for output (this node is also part of the grid).");
    X.println(">>>");
  }
コード例 #2
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  /**
   * Prints a phrase on the grid nodes running anonymous closure objects and calculating total
   * number of letters.
   *
   * @param phrase Phrase to print on of the grid nodes.
   * @throws GridException If failed.
   */
  private static void countLettersClosure(String phrase) throws GridException {
    X.println(">>> Starting countLettersClosure() example...");

    // Explicitly execute the collection of callable objects and receive a result.
    Collection<Integer> results =
        G.grid()
            .call(
                SPREAD,
                new GridClosure<String, Integer>() { // Create executable logic.
                  @Override
                  public Integer apply(String word) {
                    // Print out a given word, just so we can
                    // see which node is doing what.
                    X.println(">>> Executing word: " + word);

                    // Return the length of a given word, i.e. number of letters.
                    return word.length();
                  }
                },
                Arrays.asList(phrase.split(" "))); // Collection of arguments for closures.

    // Add up all results using convenience 'sum()' method.
    int letterCnt = F.sum(results);

    X.println(">>>");
    X.println(">>> Finished execution of counting letters with closure based on GridGain 3.0 API.");
    X.println(">>> You should see the phrase '" + phrase + "' printed out on the nodes.");
    X.println(">>> Total number of letters in the phrase is '" + letterCnt + "'.");
    X.println(">>> Check all nodes for output (this node is also part of the grid).");
    X.println(">>>");
  }
コード例 #3
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  /**
   * Prints every word a phrase on different nodes.
   *
   * @param phrase Phrase from which to print words on different nodes.
   * @throws GridException If failed.
   */
  private static void spreadWordsClosure(String phrase) throws GridException {
    X.println(">>> Starting spreadWordsClosure() example...");

    // Splits the passed in phrase into words and prints every word
    // on a individual grid node. If there are more words than nodes -
    // some nodes will print more than one word.
    G.grid()
        .run(
            SPREAD,
            F.yield(
                phrase.split(" "),
                new GridInClosure<String>() {
                  @Override
                  public void apply(String word) {
                    X.println(word);
                  }
                }));

    // NOTE:
    //
    // Alternatively, you can use existing closure 'F.println()' to
    // print any yield result in 'F.yield()' like so:
    //
    // G.grid().run(SPREAD, F.yield(phrase.split(" "), F.println()));
    //

    X.println(">>>");
    X.println(
        ">>> Finished printing individual words on different nodes based on GridGain 3.0 API.");
    X.println(">>> Check all nodes for output (this node is also part of the grid).");
    X.println(">>>");
  }
コード例 #4
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  /**
   * Prints a phrase on one of the grid nodes running anonymous runnable.
   *
   * @param phrase Phrase to print on one of the grid nodes.
   * @throws GridException If failed.
   */
  private static void unicastWordsRunnable(final String phrase) throws GridException {
    X.println(">>> Starting unicastWordsRunnable() example...");

    G.grid()
        .run(
            UNICAST,
            new GridRunnable() {
              @Override
              public void run() {
                X.println(">>> Printing phrase: " + phrase);
              }
            });

    // NOTE:
    //
    // Alternatively, you can use existing closure 'F.println()' to
    // print any text like so:
    //
    // G.grid().run(UNICAST, F.println(">>> Printing phrase: " + phrase));
    //

    X.println(">>>");
    X.println(">>> Finished execution of runnable object based on GridGain 3.0 API.");
    X.println(">>> You should see the phrase '" + phrase + "' printed out on one of the nodes.");
    X.println(">>> Check all nodes for output (this node is also part of the grid).");
    X.println(">>>");
  }
コード例 #5
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  /**
   * Broadcasts a give phrase to all nodes.
   *
   * @param phrase Phrase to broadcast.
   * @throws GridException If failed.
   */
  private static void broadcastWordsClosure(final String phrase) throws GridException {
    X.println(">>> Starting broadcastWordsClosure() example...");

    G.grid()
        .run(
            BROADCAST,
            new GridAbsClosure() {
              @Override
              public void apply() {
                X.println(">>> Printing phrase: " + phrase);
              }
            });

    // NOTE:
    //
    // Alternatively, you can use existing closure 'F.println()' to
    // print any text like so:
    //
    // G.grid().run(BROADCAST, F.println(">>> Printing phrase: " + phrase));
    //

    X.println(">>>");
    X.println(">>> Finished broadcasting a phrase to all grid nodes based on GridGain 3.0 API.");
    X.println(">>> Check all nodes for output (this node is also part of the grid).");
    X.println(">>>");
  }
コード例 #6
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ファイル: GridHelloWorldExample.java プロジェクト: f1yegor/gg
  /**
   * Execute {@code HelloWorld} example on the grid.
   *
   * @param args Command line arguments, none required but if provided first one should point to the
   *     Spring XML configuration file. See {@code "examples/config/"} for configuration file
   *     examples.
   * @throws GridException If example execution failed.
   */
  public static void main(String[] args) throws GridException {
    if (args.length == 0) {
      G.start();
    } else {
      G.start(args[0]);
    }

    try {
      Grid grid = G.grid();

      // Execute Hello World task.
      GridTaskFuture<Integer> fut = grid.execute(GridHelloWorldTask.class, "Hello World");

      // Wait for task completion.
      int phraseLen = fut.get();

      X.println(">>>");
      X.println(">>> Finished executing Grid \"Hello World\" example with custom task.");
      X.println(">>> Total number of characters in the phrase is '" + phraseLen + "'.");
      X.println(">>> You should see print out of 'Hello' on one node and 'World' on another node.");
      X.println(">>> Check all nodes for output (this node is also part of the grid).");
      X.println(">>>");
    } finally {
      G.stop(true);
    }
  }
コード例 #7
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  /**
   * Calculates length of a given phrase on the grid.
   *
   * @param phrase Phrase to count the number of letters in.
   * @throws GridException If failed.
   */
  private static void countLettersReducer(String phrase) throws GridException {
    X.println(">>> Starting countLettersReducer() example...");

    Grid grid = G.grid();

    // Logger to use in your closure. Note that even though we assign it
    // to a local variable, GridGain still allows to use it from remotely
    // executed code.
    final GridLogger log = grid.log();

    // Execute Hello World task.
    int letterCnt =
        grid.reduce(
            BALANCE,
            new GridClosure<String, Integer>() { // Create executable logic.
              @Override
              public Integer apply(String word) {
                // Print out a given word, just so we can
                // see which node is doing what.
                log.info(">>> Calculating for word: " + word);

                // Return the length of a given word, i.e. number of letters.
                return word.length();
              }
            },
            Arrays.asList(phrase.split(" ")), // Collection of words.
            // Create custom reducer.
            // NOTE: Alternatively, you can use existing reducer: F.sumIntReducer()
            new GridReducer<Integer, Integer>() {
              private int sum;

              @Override
              public boolean collect(Integer res) {
                sum += res;

                return true; // True means continue collecting until last result.
              }

              @Override
              public Integer apply() {
                return sum;
              }
            });

    X.println(">>>");
    X.println(">>> Finished execution of counting letters with reducer based on GridGain 3.0 API.");
    X.println(">>> Total number of letters in the phrase is '" + letterCnt + "'.");
    X.println(">>> You should see individual words printed out on different nodes.");
    X.println(">>> Check all nodes for output (this node is also part of the grid).");
    X.println(">>>");
  }
コード例 #8
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  /**
   * Starts Grid instance. Note that if grid is already started, then it will be looked up and
   * returned from this method.
   *
   * @return Started grid.
   */
  private Grid startGrid() {
    Properties props = System.getProperties();

    gridName = props.getProperty(GRIDGAIN_NAME.name());

    if (!props.containsKey(GRIDGAIN_NAME.name()) || G.state(gridName) != GridFactoryState.STARTED) {
      selfStarted = true;

      // Set class loader for the spring.
      ClassLoader curCl = Thread.currentThread().getContextClassLoader();

      // Add no-op logger to remove no-appender warning.
      Appender app = new NullAppender();

      Logger.getRootLogger().addAppender(app);

      try {
        Thread.currentThread().setContextClassLoader(getClass().getClassLoader());

        Grid grid = G.start(cfgPath);

        gridName = grid.name();

        System.setProperty(GRIDGAIN_NAME.name(), grid.name());

        return grid;
      } catch (GridException e) {
        throw new GridRuntimeException("Failed to start grid: " + cfgPath, e);
      } finally {
        Logger.getRootLogger().removeAppender(app);

        Thread.currentThread().setContextClassLoader(curCl);
      }
    }

    return G.grid(gridName);
  }
コード例 #9
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  /**
   * Executes {@link GridSegmentATask} and {@link GridSegmentBTask} tasks on the grid.
   *
   * @param args Command line arguments, none required or used.
   * @throws GridException If example execution failed.
   */
  public static void main(String[] args) throws GridException {
    AbstractApplicationContext ctx =
        new ClassPathXmlApplicationContext("org/gridgain/examples/multispi/master.xml");

    // Get configuration from Spring.
    GridConfiguration cfg = ctx.getBean("grid.cfg", GridConfiguration.class);

    G.start(cfg);

    try {
      Grid grid = G.grid();

      // Execute task on segment "A".
      GridTaskFuture<Integer> futA = grid.execute(GridSegmentATask.class, null);

      // Execute task on segment "B".
      GridTaskFuture<Integer> futB = grid.execute(GridSegmentBTask.class, null);

      // Wait for task completion.
      futA.get();
      futB.get();

      X.println(">>>");
      X.println(">>> Finished executing Grid \"Multiple Topology\" example with custom tasks.");
      X.println(
          ">>> You should see print out of 'Executing job on node that is from segment A.'"
              + "on node that has attribute \"segment=A\"");
      X.println(
          ">>> and 'Executing job on node that is from segment B.' on node that has "
              + "attribute \"segment=B\"");
      X.println(">>> Check all nodes for output (this node is not a part of the grid).");
      X.println(">>>");
    } finally {
      G.stop(true);
    }
  }
コード例 #10
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  /**
   * Aspect implementation which executes grid-enabled methods on remote nodes.
   *
   * @param invoc Method invocation instance provided by JBoss AOP framework.
   * @return Method execution result.
   * @throws Throwable If method execution failed.
   */
  @SuppressWarnings({
    "ProhibitedExceptionDeclared",
    "ProhibitedExceptionThrown",
    "CatchGenericClass",
    "unchecked"
  })
  @Bind(
      pointcut = "execution(* *->@org.gridgain.grid.gridify.Gridify(..))",
      cflow = "org.gridgain.grid.gridify.aop.jboss.GridifyJbossAspect.CFLOW_STACK")
  public Object gridify(MethodInvocation invoc) throws Throwable {
    Method mtd = invoc.getMethod();

    Gridify ann = mtd.getAnnotation(Gridify.class);

    assert ann != null : "Intercepted method does not have gridify annotation.";

    // Since annotations in Java don't allow 'null' as default value
    // we have accept an empty string and convert it here.
    // NOTE: there's unintended behavior when user specifies an empty
    // string as intended grid name.
    // NOTE: the 'ann.gridName() == null' check is added to mitigate
    // annotation bugs in some scripting languages (e.g. Groovy).
    String gridName = F.isEmpty(ann.gridName()) ? null : ann.gridName();

    if (G.state(gridName) != STARTED) {
      throw new GridException("Grid is not locally started: " + gridName);
    }

    // Initialize defaults.
    GridifyArgument arg =
        new GridifyArgumentAdapter(
            mtd.getDeclaringClass(),
            mtd.getName(),
            mtd.getParameterTypes(),
            invoc.getArguments(),
            invoc.getTargetObject());

    if (!ann.interceptor().equals(GridifyInterceptor.class)) {
      // Check interceptor first.
      if (!ann.interceptor().newInstance().isGridify(ann, arg)) {
        return invoc.invokeNext();
      }
    }

    if (!ann.taskClass().equals(GridifyDefaultTask.class) && ann.taskName().length() > 0) {
      throw new GridException(
          "Gridify annotation must specify either Gridify.taskName() or "
              + "Gridify.taskClass(), but not both: "
              + ann);
    }

    try {
      Grid grid = G.grid(gridName);

      // If task class was specified.
      if (!ann.taskClass().equals(GridifyDefaultTask.class)) {
        return grid.execute(
                (Class<? extends GridTask<GridifyArgument, Object>>) ann.taskClass(),
                arg,
                ann.timeout())
            .get();
      }

      // If task name was not specified.
      if (ann.taskName().length() == 0) {
        return grid.execute(
                new GridifyDefaultTask(invoc.getActualMethod().getDeclaringClass()),
                arg,
                ann.timeout())
            .get();
      }

      // If task name was specified.
      return grid.execute(ann.taskName(), arg, ann.timeout()).get();
    } catch (Throwable e) {
      for (Class<?> ex : invoc.getMethod().getExceptionTypes()) {
        // Descend all levels down.
        Throwable cause = e.getCause();

        while (cause != null) {
          if (ex.isAssignableFrom(cause.getClass())) {
            throw cause;
          }

          cause = cause.getCause();
        }

        if (ex.isAssignableFrom(e.getClass())) {
          throw e;
        }
      }

      throw new GridifyRuntimeException("Undeclared exception thrown: " + e.getMessage(), e);
    }
  }