Exemplo n.º 1
0
  /**
   * 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(">>>");
  }
Exemplo n.º 2
0
  /**
   * 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(">>>");
  }
  /**
   * Method grid-enabled with {@link Gridify} annotation and will be executed on the grid. Simply
   * prints out the argument passed in and returns its length.
   *
   * <p>Note that in this case instead of using default task, we provide our own task which will
   * split the passed in string into separate words to be printed on remote nodes. The timeout
   * parameter tells grid that method execution should fail if no result is received in 5 seconds.
   *
   * @param phrase Phrase string to print.
   * @return Number of characters in the phrase.
   */
  @Gridify(taskClass = GridifyHelloWorldTask.class, timeout = 5000)
  public static int sayIt(String phrase) {
    // Simply print out the argument.
    X.println(">>>");
    X.println(">>> Printing '" + phrase + "' on this node from grid-enabled method.");
    X.println(">>>");

    return phrase.length();
  }
Exemplo n.º 4
0
  /**
   * Queries all persons and shows their names.
   *
   * @param conn JDBC connection.
   * @throws SQLException In case of SQL error.
   */
  private static void queryAllPersons(Connection conn) throws SQLException {
    Statement stmt = conn.createStatement();

    ResultSet rs = stmt.executeQuery("select name from Person");

    X.println(">>> All persons:");

    while (rs.next()) X.println(">>>     " + rs.getString(1));
  }
  /** {@inheritDoc} */
  @Override
  public Object onReceive(@Nullable Object obj) {
    if (obj instanceof byte[]) {
      X.println(">>> Byte array received over REST: " + Arrays.toString((byte[]) obj));

      BigInteger val = new BigInteger((byte[]) obj);

      X.println(">>> Unpacked a BigInteger from byte array received over REST: " + val);

      return val;
    } else return obj;
  }
Exemplo n.º 6
0
  /**
   * Queries persons older than provided age.
   *
   * @param conn JDBC connection.
   * @param minAge Minimum age.
   * @throws SQLException In case of SQL error.
   */
  private static void queryPersons(Connection conn, int minAge) throws SQLException {
    PreparedStatement stmt = conn.prepareStatement("select name, age from Person where age >= ?");

    stmt.setInt(1, minAge);

    ResultSet rs = stmt.executeQuery();

    X.println(">>> Persons older than " + minAge + ":");

    while (rs.next())
      X.println(">>>     " + rs.getString("NAME") + " (" + rs.getInt("AGE") + " years old)");
  }
  /** {@inheritDoc} */
  @Override
  public Object onSend(Object obj) {
    if (obj instanceof BigInteger) {
      X.println(">>> Creating byte array from BigInteger to send over REST: " + obj);

      byte[] bytes = ((BigInteger) obj).toByteArray();

      X.println(
          ">>> Created byte array from BigInteger to send over REST: " + Arrays.toString(bytes));

      return bytes;
    } else return obj;
  }
Exemplo n.º 8
0
  /**
   * Queries persons working in provided organization.
   *
   * @param conn JDBC
   * @param orgName Organization name.
   * @throws SQLException In case of SQL error.
   */
  private static void queryPersonsInOrganization(Connection conn, String orgName)
      throws SQLException {
    PreparedStatement stmt =
        conn.prepareStatement(
            "select p.name from Person p, Organization o where p.orgId = o.id and o.name = ?");

    stmt.setString(1, orgName);

    ResultSet rs = stmt.executeQuery();

    X.println(">>> Persons working in " + orgName + ":");

    while (rs.next()) X.println(">>>     " + rs.getString(1));
  }
Exemplo n.º 9
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(">>>");
  }
Exemplo n.º 10
0
  /**
   * 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(">>>");
  }
Exemplo n.º 11
0
  /**
   * 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);
    }
  }
Exemplo n.º 12
0
  /**
   * 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(">>>");
  }
  /**
   * Execute {@code HelloWorld} example grid-enabled with {@code Gridify} annotation.
   *
   * @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 {
      // Simple example stateful instance to demonstrate
      // how object state can be handled with grid-enabled methods.
      GridifyHelloWorld helloWorld = new GridifyHelloWorld();

      // Set simple state.
      helloWorld.setState("Hello World");

      // This method is grid-enabled and
      // will be executed on remote grid nodes.
      int phraseLen = helloWorld.sayIt();

      X.println(">>>");
      X.println(">>> Finished executing Gridify \"Hello World\" stateful example.");
      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);
    }
  }
Exemplo n.º 14
0
  /**
   * Runs JDBC example.
   *
   * @param args Command line arguments.
   * @throws Exception In case of error.
   */
  public static void main(String[] args) throws Exception {
    Grid grid = G.start("examples/config/spring-cache.xml");

    Connection conn = null;

    try {
      // Populate cache with data.
      populate(grid.cache(CACHE_NAME));

      // Register JDBC driver.
      Class.forName("org.gridgain.jdbc.GridJdbcDriver");

      // Open JDBC connection.
      conn =
          DriverManager.getConnection("jdbc:gridgain://localhost/" + CACHE_NAME, configuration());

      X.println(">>>");

      // Query all persons.
      queryAllPersons(conn);

      X.println(">>>");

      // Query person older than 30 years.
      queryPersons(conn, 30);

      X.println(">>>");

      // Query persons working in GridGain.
      queryPersonsInOrganization(conn, "GridGain");

      X.println(">>>");
    } finally {
      // Close JDBC connection.
      if (conn != null) conn.close();

      G.stop(true);
    }
  }
Exemplo n.º 15
0
  /**
   * 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(">>>");
  }
  /**
   * Execute {@code HelloWorld} example grid-enabled with {@code Gridify} annotation.
   *
   * @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 {
      // This method will be executed on a remote grid nodes.
      int phraseLen = sayIt("Hello World");

      X.println(">>>");
      X.println(">>> Finished executing Gridify \"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);
    }
  }
  /**
   * 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);
    }
  }
Exemplo n.º 18
0
  /**
   * Starts up grid and checks all provided values for prime.
   *
   * @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 {
    // Starts grid.
    Grid grid = args.length == 0 ? G.start() : G.start(args[0]);

    // Values we want to check for prime.
    long[] checkVals = {32452841, 32452843, 32452847, 32452849, 236887699, 217645199};

    X.println(">>>");
    X.println(
        ">>> Starting to check the following numbers for primes: " + Arrays.toString(checkVals));

    try {
      long start = System.currentTimeMillis();

      for (long checkVal : checkVals) {
        // This method will be executed on the Grid as it is
        // annotated with @Gridify annotation.
        Long divisor = GridPrimeChecker.checkPrime(checkVal, 2, checkVal);

        // If divisor is null, then the number is prime.
        if (divisor == null) {
          X.println("Value '" + checkVal + "'is a prime number.");
        } else {
          X.println("Value '" + checkVal + "' is divisible by '" + divisor + '\'');
        }
      }

      long totalTime = System.currentTimeMillis() - start;

      X.println(">>> Total time to calculate all primes (milliseconds): " + totalTime);
      X.println(">>>");
    } finally {
      // Stops grid.
      G.stop(grid.name(), true);
    }
  }
  /**
   * @param args Command arguments.
   * @throws GridException If failed.
   */
  public static void main(String[] args) throws GridException {
    // Starts grid.
    Grid grid = args.length == 0 ? G.start() : G.start(args[0]);

    try {
      // Create portfolio.
      GridCredit[] portfolio = new GridCredit[5000];

      Random rnd = new Random();

      // Generate some test portfolio items.
      for (int i = 0; i < portfolio.length; i++) {
        portfolio[i] =
            new GridCredit(
                50000 * rnd.nextDouble(), // Credit amount.
                rnd.nextInt(1000), // Credit term in days.
                rnd.nextDouble() / 10, // APR.
                rnd.nextDouble() / 20 + 0.02 // EDF.
                );
      }

      // Forecast horizon in days.
      int horizon = 365;

      // Number of Monte-Carlo iterations.
      int iter = 10000;

      // Percentile.
      double percentile = 0.95;

      // Mark the stopwatch.
      long start = System.currentTimeMillis();

      // Calculate credit risk and print it out.
      // As you can see the grid enabling is completely hidden from the caller
      // and it is fully transparent to him. In fact, the caller is never directly
      // aware if method was executed just locally or on the 100s of grid nodes.
      // Credit risk crdRisk is the minimal amount that creditor has to have
      // available to cover possible defaults.
      double crdRisk =
          grid.reduce(
              SPREAD,
              closures(grid.size(), portfolio, horizon, iter, percentile),
              new R1<Double, Double>() {
                /** Collected values sum. */
                private double sum;

                /** Collected values count. */
                private int count;

                /** {@inheritDoc} */
                @Override
                public boolean collect(Double e) {
                  sum += e;
                  count++;

                  return true;
                }

                /** {@inheritDoc} */
                @Override
                public Double apply() {
                  return sum / count;
                }
              });

      X.println(
          "Credit risk [crdRisk="
              + crdRisk
              + ", duration="
              + (System.currentTimeMillis() - start)
              + "ms]");
    }
    // We specifically don't do any error handling here to
    // simplify the example. Real application may want to
    // add error handling and application specific recovery.
    finally {
      // Stops grid.
      G.stop(true);
    }
  }
 /** {@inheritDoc} */
 @Override
 public void printMemoryStats() {
   X.println(">>>");
   X.println(">>> Task session processor memory stats [grid=" + ctx.gridName() + ']');
   X.println(">>>  sesMapSize: " + sesMap.size());
 }
Exemplo n.º 21
0
  /**
   * Runs basic cache example.
   *
   * @param args Command line arguments, none required.
   * @throws Exception If example execution failed.
   */
  public static void main(String[] args) throws Exception {
    final Grid g =
        args.length == 0 ? G.start("examples/config/spring-cache.xml") : G.start(args[0]);

    try {
      // Subscribe to events on every node, so we can visualize what's
      // happening in remote caches.
      g.run(
          BROADCAST,
          new CA() {
            @Override
            public void apply() {
              GridLocalEventListener lsnr =
                  new GridLocalEventListener() {
                    @Override
                    public void onEvent(GridEvent event) {
                      switch (event.type()) {
                        case EVT_CACHE_OBJECT_PUT:
                        case EVT_CACHE_OBJECT_READ:
                        case EVT_CACHE_OBJECT_REMOVED:
                          {
                            GridCacheEvent e = (GridCacheEvent) event;

                            X.println("Cache event [name=" + e.name() + ", key=" + e.key() + ']');
                          }
                      }
                    }
                  };

              GridNodeLocal<String, GridLocalEventListener> loc = g.nodeLocal();

              GridLocalEventListener prev = loc.remove("lsnr");

              // If there is a listener subscribed from previous runs, unsubscribe it.
              if (prev != null) g.removeLocalEventListener(prev);

              // Record new listener, so we can check it on next run.
              loc.put("lsnr", lsnr);

              // Subscribe listener.
              g.addLocalEventListener(lsnr, EVTS_CACHE);
            }
          });

      final GridCacheProjection<Integer, String> cache =
          g.cache(CACHE_NAME).projection(Integer.class, String.class);

      final int keyCnt = 20;

      // Store keys in cache.
      for (int i = 0; i < keyCnt; i++) cache.putx(i, Integer.toString(i));

      // Peek and get on local node.
      for (int i = 0; i < keyCnt; i++) {
        X.println("Peeked [key=" + i + ", val=" + cache.peek(i) + ']');
        X.println("Got [key=" + i + ", val=" + cache.get(i) + ']');
      }

      // Projection (view) for remote nodes.
      GridProjection rmts = g.remoteProjection();

      if (!rmts.isEmpty()) {
        // Peek and get on remote nodes (comment it out if output gets too crowded).
        g.remoteProjection()
            .run(
                BROADCAST,
                new GridAbsClosureX() {
                  @Override
                  public void applyx() throws GridException {
                    for (int i = 0; i < keyCnt; i++) {
                      X.println("Peeked [key=" + i + ", val=" + cache.peek(i) + ']');
                      X.println("Got [key=" + i + ", val=" + cache.get(i) + ']');
                    }
                  }
                });
      }
    } finally {
      G.stop(true);
    }
  }