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Posted to commits@ignite.apache.org by dm...@apache.org on 2015/10/22 15:01:26 UTC
[10/42] ignite git commit: IGNITE-1653
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/cluster/ClusterGroupExample.java
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diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/cluster/ClusterGroupExample.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/cluster/ClusterGroupExample.java
new file mode 100644
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@@ -0,0 +1,86 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.examples.java8.cluster;
+
+import org.apache.ignite.Ignite;
+import org.apache.ignite.IgniteCluster;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.Ignition;
+import org.apache.ignite.cluster.ClusterGroup;
+import org.apache.ignite.examples.ExampleNodeStartup;
+import org.apache.ignite.examples.ExamplesUtils;
+
+/**
+ * Demonstrates new functional APIs.
+ * <p>
+ * Remote nodes should always be started with special configuration file which
+ * enables P2P class loading: {@code 'ignite.{sh|bat} examples/config/example-ignite.xml'}.
+ * <p>
+ * Alternatively you can run {@link ExampleNodeStartup} in another JVM which will start node
+ * with {@code examples/config/example-ignite.xml} configuration.
+ */
+public class ClusterGroupExample {
+ /**
+ * Executes example.
+ *
+ * @param args Command line arguments, none required.
+ * @throws IgniteException If example execution failed.
+ */
+ public static void main(String[] args) throws IgniteException {
+ try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
+ if (!ExamplesUtils.checkMinTopologySize(ignite.cluster(), 2))
+ return;
+
+ System.out.println();
+ System.out.println("Compute example started.");
+
+ IgniteCluster cluster = ignite.cluster();
+
+ // Say hello to all nodes in the cluster, including local node.
+ sayHello(ignite, cluster);
+
+ // Say hello to all remote nodes.
+ sayHello(ignite, cluster.forRemotes());
+
+ // Pick random node out of remote nodes.
+ ClusterGroup randomNode = cluster.forRemotes().forRandom();
+
+ // Say hello to a random node.
+ sayHello(ignite, randomNode);
+
+ // Say hello to all nodes residing on the same host with random node.
+ sayHello(ignite, cluster.forHost(randomNode.node()));
+
+ // Say hello to all nodes that have current CPU load less than 50%.
+ sayHello(ignite, cluster.forPredicate(n -> n.metrics().getCurrentCpuLoad() < 0.5));
+ }
+ }
+
+ /**
+ * Print 'Hello' message on remote nodes.
+ *
+ * @param ignite Ignite.
+ * @param grp Cluster group.
+ * @throws IgniteException If failed.
+ */
+ private static void sayHello(Ignite ignite, final ClusterGroup grp) throws IgniteException {
+ // Print out hello message on all cluster nodes.
+ ignite.compute(grp).broadcast(
+ () -> System.out.println(">>> Hello Node: " + grp.ignite().cluster().localNode().id()));
+ }
+}
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http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/cluster/package-info.java
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diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/cluster/package-info.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/cluster/package-info.java
new file mode 100644
index 0000000..b96e98a
--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/cluster/package-info.java
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * <!-- Package description. -->
+ * Cluster group example.
+ */
+package org.apache.ignite.examples.java8.cluster;
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeAsyncExample.java
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diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeAsyncExample.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeAsyncExample.java
new file mode 100644
index 0000000..8d9cc64
--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeAsyncExample.java
@@ -0,0 +1,75 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.examples.java8.computegrid;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import org.apache.ignite.Ignite;
+import org.apache.ignite.IgniteCompute;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.Ignition;
+import org.apache.ignite.examples.ExampleNodeStartup;
+import org.apache.ignite.lang.IgniteFuture;
+import org.apache.ignite.lang.IgniteRunnable;
+
+/**
+ * Demonstrates a simple use of {@link IgniteRunnable}.
+ * <p>
+ * Remote nodes should always be started with special configuration file which
+ * enables P2P class loading: {@code 'ignite.{sh|bat} examples/config/example-ignite.xml'}.
+ * <p>
+ * Alternatively you can run {@link ExampleNodeStartup} in another JVM which will start node
+ * with {@code examples/config/example-ignite.xml} configuration.
+ */
+public class ComputeAsyncExample {
+ /**
+ * Executes example.
+ *
+ * @param args Command line arguments, none required.
+ * @throws IgniteException If example execution failed.
+ */
+ public static void main(String[] args) throws IgniteException {
+ try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
+ System.out.println();
+ System.out.println("Compute asynchronous example started.");
+
+ // Enable asynchronous mode.
+ IgniteCompute compute = ignite.compute().withAsync();
+
+ Collection<IgniteFuture<?>> futs = new ArrayList<>();
+
+ // Iterate through all words in the sentence and create runnable jobs.
+ for (final String word : "Print words using runnable".split(" ")) {
+ // Execute runnable on some node.
+ compute.run(() -> {
+ System.out.println();
+ System.out.println(">>> Printing '" + word + "' on this node from ignite job.");
+ });
+
+ futs.add(compute.future());
+ }
+
+ // Wait for completion of all futures.
+ futs.forEach(IgniteFuture::get);
+
+ System.out.println();
+ System.out.println(">>> Finished printing words using runnable execution.");
+ System.out.println(">>> Check all nodes for output (this node is also part of the cluster).");
+ }
+ }
+}
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http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeBroadcastExample.java
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diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeBroadcastExample.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeBroadcastExample.java
new file mode 100644
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--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeBroadcastExample.java
@@ -0,0 +1,102 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.examples.java8.computegrid;
+
+import java.util.Collection;
+import org.apache.ignite.Ignite;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.Ignition;
+import org.apache.ignite.examples.ExampleNodeStartup;
+
+/**
+ * Demonstrates broadcasting computations within cluster.
+ * <p>
+ * Remote nodes should always be started with special configuration file which
+ * enables P2P class loading: {@code 'ignite.{sh|bat} examples/config/example-ignite.xml'}.
+ * <p>
+ * Alternatively you can run {@link ExampleNodeStartup} in another JVM which will start node
+ * with {@code examples/config/example-ignite.xml} configuration.
+ */
+public class ComputeBroadcastExample {
+ /**
+ * Executes example.
+ *
+ * @param args Command line arguments, none required.
+ * @throws IgniteException If example execution failed.
+ */
+ public static void main(String[] args) throws IgniteException {
+ try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
+ System.out.println();
+ System.out.println(">>> Compute broadcast example started.");
+
+ // Print hello message on all nodes.
+ hello(ignite);
+
+ // Gather system info from all nodes.
+ gatherSystemInfo(ignite);
+ }
+ }
+
+ /**
+ * Print 'Hello' message on all nodes.
+ *
+ * @param ignite Ignite instance.
+ * @throws IgniteException If failed.
+ */
+ private static void hello(Ignite ignite) throws IgniteException {
+ // Print out hello message on all nodes.
+ ignite.compute().broadcast(() -> {
+ System.out.println();
+ System.out.println(">>> Hello Node! :)");
+ });
+
+ System.out.println();
+ System.out.println(">>> Check all nodes for hello message output.");
+ }
+
+ /**
+ * Gather system info from all nodes and print it out.
+ *
+ * @param ignite Ignite instance.
+ * @throws IgniteException if failed.
+ */
+ private static void gatherSystemInfo(Ignite ignite) throws IgniteException {
+ // Gather system info from all nodes.
+ Collection<String> res = ignite.compute().broadcast(() -> {
+ System.out.println();
+ System.out.println("Executing task on node: " + ignite.cluster().localNode().id());
+
+ return "Node ID: " + ignite.cluster().localNode().id() + "\n" +
+ "OS: " + System.getProperty("os.name") + " " + System.getProperty("os.version") + " " +
+ System.getProperty("os.arch") + "\n" +
+ "User: " + System.getProperty("user.name") + "\n" +
+ "JRE: " + System.getProperty("java.runtime.name") + " " +
+ System.getProperty("java.runtime.version");
+ });
+
+ // Print result.
+ System.out.println();
+ System.out.println("Nodes system information:");
+ System.out.println();
+
+ res.forEach(r -> {
+ System.out.println(r);
+ System.out.println();
+ });
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeCallableExample.java
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diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeCallableExample.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeCallableExample.java
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+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeCallableExample.java
@@ -0,0 +1,75 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.examples.java8.computegrid;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import org.apache.ignite.Ignite;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.Ignition;
+import org.apache.ignite.examples.ExampleNodeStartup;
+import org.apache.ignite.lang.IgniteCallable;
+
+/**
+ * Demonstrates using of {@link IgniteCallable} job execution on the cluster.
+ * <p>
+ * This example takes a sentence composed of multiple words and counts number of non-space
+ * characters in the sentence by having each compute job count characters in each individual
+ * word.
+ * <p>
+ * Remote nodes should always be started with special configuration file which
+ * enables P2P class loading: {@code 'ignite.{sh|bat} examples/config/example-ignite.xml'}.
+ * <p>
+ * Alternatively you can run {@link ExampleNodeStartup} in another JVM which will start node
+ * with {@code examples/config/example-ignite.xml} configuration.
+ */
+public class ComputeCallableExample {
+ /**
+ * Executes example.
+ *
+ * @param args Command line arguments, none required.
+ * @throws IgniteException If example execution failed.
+ */
+ public static void main(String[] args) throws IgniteException {
+ try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
+ System.out.println();
+ System.out.println(">>> Compute callable example started.");
+
+ Collection<IgniteCallable<Integer>> calls = new ArrayList<>();
+
+ // Iterate through all words in the sentence and create callable jobs.
+ for (String word : "Count characters using callable".split(" ")) {
+ calls.add(() -> {
+ System.out.println();
+ System.out.println(">>> Printing '" + word + "' on this node from ignite job.");
+
+ return word.length();
+ });
+ }
+
+ // Execute collection of callables on the ignite.
+ Collection<Integer> res = ignite.compute().call(calls);
+
+ int sum = res.stream().mapToInt(i -> i).sum();
+
+ System.out.println();
+ System.out.println(">>> Total number of characters in the phrase is '" + sum + "'.");
+ System.out.println(">>> Check all nodes for output (this node is also part of the cluster).");
+ }
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeClosureExample.java
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diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeClosureExample.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeClosureExample.java
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+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeClosureExample.java
@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.examples.java8.computegrid;
+
+import java.util.Arrays;
+import java.util.Collection;
+import org.apache.ignite.Ignite;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.Ignition;
+import org.apache.ignite.examples.ExampleNodeStartup;
+
+/**
+ * Demonstrates a simple use of Ignite with reduce closure.
+ * <p>
+ * This example splits a phrase into collection of words, computes their length on different
+ * nodes and then computes total amount of non-whitespaces characters in the phrase.
+ * <p>
+ * Remote nodes should always be started with special configuration file which
+ * enables P2P class loading: {@code 'ignite.{sh|bat} examples/config/example-ignite.xml'}.
+ * <p>
+ * Alternatively you can run {@link ExampleNodeStartup} in another JVM which will start node
+ * with {@code examples/config/example-ignite.xml} configuration.
+ */
+public class ComputeClosureExample {
+ /**
+ * Executes example.
+ *
+ * @param args Command line arguments, none required.
+ * @throws IgniteException If example execution failed.
+ */
+ public static void main(String[] args) throws IgniteException {
+ try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
+ System.out.println();
+ System.out.println(">>> Compute closure example started.");
+
+ // Execute closure on all cluster nodes.
+ Collection<Integer> res = ignite.compute().apply(
+ (String word) -> {
+ System.out.println();
+ System.out.println(">>> Printing '" + word + "' on this node from ignite job.");
+
+ // Return number of letters in the word.
+ return word.length();
+ },
+ // Job parameters. Ignite will create as many jobs as there are parameters.
+ Arrays.asList("Count characters using closure".split(" "))
+ );
+
+ int sum = res.stream().mapToInt(i -> i).sum();
+
+ System.out.println();
+ System.out.println(">>> Total number of characters in the phrase is '" + sum + "'.");
+ System.out.println(">>> Check all nodes for output (this node is also part of the cluster).");
+ }
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeRunnableExample.java
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diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeRunnableExample.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeRunnableExample.java
new file mode 100644
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--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/ComputeRunnableExample.java
@@ -0,0 +1,64 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.examples.java8.computegrid;
+
+import org.apache.ignite.Ignite;
+import org.apache.ignite.IgniteCompute;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.Ignition;
+import org.apache.ignite.examples.ExampleNodeStartup;
+import org.apache.ignite.lang.IgniteRunnable;
+
+/**
+ * Demonstrates a simple use of {@link IgniteRunnable}.
+ * <p>
+ * Remote nodes should always be 0started with special configuration file which
+ * enables P2P class loading: {@code 'ignite.{sh|bat} examples/config/example-ignite.xml'}.
+ * <p>
+ * Alternatively you can run {@link ExampleNodeStartup} in another JVM which will start node
+ * with {@code examples/config/example-ignite.xml} configuration.
+ */
+public class ComputeRunnableExample {
+ /**
+ * Executes example.
+ *
+ * @param args Command line arguments, none required.
+ * @throws IgniteException If example execution failed.
+ */
+ public static void main(String[] args) throws IgniteException {
+ try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
+ System.out.println();
+ System.out.println("Compute runnable example started.");
+
+ IgniteCompute compute = ignite.compute();
+
+ // Iterate through all words in the sentence and create runnable jobs.
+ for (final String word : "Print words using runnable".split(" ")) {
+ // Execute runnable on some node.
+ compute.run(() -> {
+ System.out.println();
+ System.out.println(">>> Printing '" + word + "' on this node from ignite job.");
+ });
+ }
+
+ System.out.println();
+ System.out.println(">>> Finished printing words using runnable execution.");
+ System.out.println(">>> Check all nodes for output (this node is also part of the cluster).");
+ }
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/package-info.java
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diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/package-info.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/package-info.java
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--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/computegrid/package-info.java
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * <!-- Package description. -->
+ * Basic examples for computational ignite functionality.
+ */
+package org.apache.ignite.examples.java8.computegrid;
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http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datagrid/CacheAffinityExample.java
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diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datagrid/CacheAffinityExample.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datagrid/CacheAffinityExample.java
new file mode 100644
index 0000000..f4a3b03
--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datagrid/CacheAffinityExample.java
@@ -0,0 +1,137 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.examples.java8.datagrid;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Map;
+import org.apache.ignite.Ignite;
+import org.apache.ignite.IgniteCache;
+import org.apache.ignite.IgniteCluster;
+import org.apache.ignite.IgniteCompute;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.Ignition;
+import org.apache.ignite.cache.CacheMode;
+import org.apache.ignite.cluster.ClusterNode;
+import org.apache.ignite.configuration.CacheConfiguration;
+import org.apache.ignite.examples.ExampleNodeStartup;
+import org.apache.ignite.lang.IgniteRunnable;
+
+/**
+ * This example demonstrates the simplest code that populates the distributed cache
+ * and co-locates simple closure execution with each key. The goal of this particular
+ * example is to provide the simplest code example of this logic.
+ * <p>
+ * Remote nodes should always be started with special configuration file which
+ * enables P2P class loading: {@code 'ignite.{sh|bat} examples/config/example-ignite.xml'}.
+ * <p>
+ * Alternatively you can run {@link ExampleNodeStartup} in another JVM which will
+ * start node with {@code examples/config/example-ignite.xml} configuration.
+ */
+public final class CacheAffinityExample {
+ /** Cache name. */
+ private static final String CACHE_NAME = CacheAffinityExample.class.getSimpleName();
+
+ /** Number of keys. */
+ private static final int KEY_CNT = 20;
+
+ /**
+ * Executes example.
+ *
+ * @param args Command line arguments, none required.
+ * @throws IgniteException If example execution failed.
+ */
+ public static void main(String[] args) throws IgniteException {
+ try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
+ System.out.println();
+ System.out.println(">>> Cache affinity example started.");
+
+ CacheConfiguration<Integer, String> cfg = new CacheConfiguration<>();
+
+ cfg.setCacheMode(CacheMode.PARTITIONED);
+ cfg.setName(CACHE_NAME);
+
+ try (IgniteCache<Integer, String> cache = ignite.getOrCreateCache(cfg)) {
+ for (int i = 0; i < KEY_CNT; i++)
+ cache.put(i, Integer.toString(i));
+
+ // Co-locates jobs with data using IgniteCompute.affinityRun(...) method.
+ visitUsingAffinityRun();
+
+ // Co-locates jobs with data using IgniteCluster.mapKeysToNodes(...) method.
+ visitUsingMapKeysToNodes();
+ }
+ }
+ }
+
+ /**
+ * Collocates jobs with keys they need to work on using
+ * {@link IgniteCompute#affinityRun(String, Object, IgniteRunnable)} method.
+ */
+ private static void visitUsingAffinityRun() {
+ Ignite ignite = Ignition.ignite();
+
+ final IgniteCache<Integer, String> cache = ignite.cache(CACHE_NAME);
+
+ for (int i = 0; i < KEY_CNT; i++) {
+ int key = i;
+
+ // This runnable will execute on the remote node where
+ // data with the given key is located. Since it will be co-located
+ // we can use local 'peek' operation safely.
+ ignite.compute().affinityRun(CACHE_NAME, key,
+ () -> System.out.println("Co-located using affinityRun [key= " + key + ", value=" + cache.localPeek(key) + ']'));
+ }
+ }
+
+ /**
+ * Collocates jobs with keys they need to work on using {@link IgniteCluster#mapKeysToNodes(String, Collection)}
+ * method. The difference from {@code affinityRun(...)} method is that here we process multiple keys
+ * in a single job.
+ */
+ private static void visitUsingMapKeysToNodes() {
+ final Ignite ignite = Ignition.ignite();
+
+ Collection<Integer> keys = new ArrayList<>(KEY_CNT);
+
+ for (int i = 0; i < KEY_CNT; i++)
+ keys.add(i);
+
+ // Map all keys to nodes.
+ Map<ClusterNode, Collection<Integer>> mappings = ignite.cluster().mapKeysToNodes(CACHE_NAME, keys);
+
+ for (Map.Entry<ClusterNode, Collection<Integer>> mapping : mappings.entrySet()) {
+ ClusterNode node = mapping.getKey();
+
+ final Collection<Integer> mappedKeys = mapping.getValue();
+
+ if (node != null) {
+ // Bring computations to the nodes where the data resides (i.e. collocation).
+ ignite.compute(ignite.cluster().forNode(node)).run(() -> {
+ IgniteCache<Integer, String> cache = ignite.cache(CACHE_NAME);
+
+ // Peek is a local memory lookup, however, value should never be 'null'
+ // as we are co-located with node that has a given key.
+ for (Integer key : mappedKeys)
+ System.out.println("Co-located using mapKeysToNodes [key= " + key +
+ ", value=" + cache.localPeek(key) + ']');
+ });
+ }
+ }
+ }
+}
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datagrid/CacheApiExample.java
----------------------------------------------------------------------
diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datagrid/CacheApiExample.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datagrid/CacheApiExample.java
new file mode 100644
index 0000000..1891a35
--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datagrid/CacheApiExample.java
@@ -0,0 +1,105 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.examples.java8.datagrid;
+
+import java.util.concurrent.ConcurrentMap;
+import org.apache.ignite.Ignite;
+import org.apache.ignite.IgniteCache;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.Ignition;
+import org.apache.ignite.cache.CacheMode;
+import org.apache.ignite.configuration.CacheConfiguration;
+import org.apache.ignite.examples.ExampleNodeStartup;
+
+/**
+ * This example demonstrates some of the cache rich API capabilities.
+ * <p>
+ * Remote nodes should always be started with special configuration file which
+ * enables P2P class loading: {@code 'ignite.{sh|bat} examples/config/example-ignite.xml'}.
+ * <p>
+ * Alternatively you can run {@link ExampleNodeStartup} in another JVM which will
+ * start node with {@code examples/config/example-ignite.xml} configuration.
+ */
+public class CacheApiExample {
+ /** Cache name. */
+ private static final String CACHE_NAME = CacheApiExample.class.getSimpleName();
+
+ /**
+ * Executes example.
+ *
+ * @param args Command line arguments, none required.
+ * @throws IgniteException If example execution failed.
+ */
+ public static void main(String[] args) throws IgniteException {
+ try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
+ System.out.println();
+ System.out.println(">>> Cache API example started.");
+
+ CacheConfiguration<Integer, String> cfg = new CacheConfiguration<>();
+
+ cfg.setCacheMode(CacheMode.PARTITIONED);
+ cfg.setName(CACHE_NAME);
+
+ try (IgniteCache<Integer, String> cache = ignite.getOrCreateCache(cfg)) {
+ // Demonstrate atomic map operations.
+ atomicMapOperations(cache);
+ }
+ }
+ }
+
+ /**
+ * Demonstrates cache operations similar to {@link ConcurrentMap} API. Note that
+ * cache API is a lot richer than the JDK {@link ConcurrentMap}.
+ *
+ * @throws IgniteException If failed.
+ */
+ private static void atomicMapOperations(final IgniteCache<Integer, String> cache) throws IgniteException {
+ System.out.println();
+ System.out.println(">>> Cache atomic map operation examples.");
+
+ // Put and return previous value.
+ String v = cache.getAndPut(1, "1");
+ assert v == null;
+
+ // Put and do not return previous value (all methods ending with 'x' return boolean).
+ // Performs better when previous value is not needed.
+ cache.put(2, "2");
+
+ // Put-if-absent.
+ boolean b1 = cache.putIfAbsent(4, "4");
+ boolean b2 = cache.putIfAbsent(4, "44");
+ assert b1 && !b2;
+
+ // Invoke - assign new value based on previous value.
+ cache.put(6, "6");
+
+ cache.invoke(6, (entry, args) -> {
+ String val = entry.getValue();
+
+ entry.setValue(val + "6"); // Set new value based on previous value.
+
+ return null;
+ });
+
+ // Replace.
+ cache.put(7, "7");
+ b1 = cache.replace(7, "7", "77");
+ b2 = cache.replace(7, "7", "777");
+ assert b1 & !b2;
+ }
+}
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datagrid/CacheAsyncApiExample.java
----------------------------------------------------------------------
diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datagrid/CacheAsyncApiExample.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datagrid/CacheAsyncApiExample.java
new file mode 100644
index 0000000..b457b27
--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datagrid/CacheAsyncApiExample.java
@@ -0,0 +1,85 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.examples.java8.datagrid;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import org.apache.ignite.Ignite;
+import org.apache.ignite.IgniteCache;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.Ignition;
+import org.apache.ignite.cache.CacheMode;
+import org.apache.ignite.configuration.CacheConfiguration;
+import org.apache.ignite.examples.ExampleNodeStartup;
+import org.apache.ignite.lang.IgniteFuture;
+
+/**
+ * This example demonstrates some of the cache rich API capabilities.
+ * <p>
+ * Remote nodes should always be started with special configuration file which
+ * enables P2P class loading: {@code 'ignite.{sh|bat} examples/config/example-ignite.xml'}.
+ * <p>
+ * Alternatively you can run {@link ExampleNodeStartup} in another JVM which will
+ * start node with {@code examples/config/example-ignite.xml} configuration.
+ */
+public class CacheAsyncApiExample {
+ /** Cache name. */
+ private static final String CACHE_NAME = CacheAsyncApiExample.class.getSimpleName();
+
+ /**
+ * Executes example.
+ *
+ * @param args Command line arguments, none required.
+ * @throws IgniteException If example execution failed.
+ */
+ public static void main(String[] args) throws IgniteException {
+ try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
+ System.out.println();
+ System.out.println(">>> Cache asynchronous API example started.");
+
+ CacheConfiguration<Integer, String> cfg = new CacheConfiguration<>();
+
+ cfg.setCacheMode(CacheMode.PARTITIONED);
+ cfg.setName(CACHE_NAME);
+
+ try (IgniteCache<Integer, String> cache = ignite.getOrCreateCache(cfg)) {
+ // Enable asynchronous mode.
+ IgniteCache<Integer, String> asyncCache = cache.withAsync();
+
+ Collection<IgniteFuture<?>> futs = new ArrayList<>();
+
+ // Execute several puts asynchronously.
+ for (int i = 0; i < 10; i++) {
+ asyncCache.put(i, String.valueOf(i));
+
+ futs.add(asyncCache.future());
+ }
+
+ // Wait for completion of all futures.
+ futs.forEach(IgniteFuture::get);
+
+ // Execute get operation asynchronously.
+ asyncCache.get(1);
+
+ // Asynchronously wait for result.
+ asyncCache.<String>future().listen(fut ->
+ System.out.println("Get operation completed [value=" + fut.get() + ']'));
+ }
+ }
+ }
+}
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datagrid/package-info.java
----------------------------------------------------------------------
diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datagrid/package-info.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datagrid/package-info.java
new file mode 100644
index 0000000..0bd86a0
--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datagrid/package-info.java
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * <!-- Package description. -->
+ * Demonstrates data ignite cache usage.
+ */
+package org.apache.ignite.examples.java8.datagrid;
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datastructures/IgniteExecutorServiceExample.java
----------------------------------------------------------------------
diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datastructures/IgniteExecutorServiceExample.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datastructures/IgniteExecutorServiceExample.java
new file mode 100644
index 0000000..0155144
--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datastructures/IgniteExecutorServiceExample.java
@@ -0,0 +1,70 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.examples.java8.datastructures;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.TimeUnit;
+import org.apache.ignite.Ignite;
+import org.apache.ignite.Ignition;
+import org.apache.ignite.examples.ExampleNodeStartup;
+import org.apache.ignite.lang.IgniteRunnable;
+
+/**
+ * Simple example to demonstrate usage of distributed executor service provided by Ignite.
+ * <p>
+ * Remote nodes should always be started with special configuration file which
+ * enables P2P class loading: {@code 'ignite.{sh|bat} examples/config/example-ignite.xml'}.
+ * <p>
+ * Alternatively you can run {@link ExampleNodeStartup} in another JVM which will start node
+ * with {@code examples/config/example-ignite.xml} configuration.
+ */
+public final class IgniteExecutorServiceExample {
+ /**
+ * Executes example.
+ *
+ * @param args Command line arguments, none required.
+ * @throws Exception If example execution failed.
+ */
+ @SuppressWarnings({"TooBroadScope"})
+ public static void main(String[] args) throws Exception {
+ try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
+ System.out.println();
+ System.out.println(">>> Compute executor service example started.");
+
+ // Get ignite-enabled executor service.
+ ExecutorService exec = ignite.executorService();
+
+ // Iterate through all words in the sentence and create callable jobs.
+ for (final String word : "Print words using runnable".split(" ")) {
+ // Execute runnable on some node.
+ exec.submit((IgniteRunnable)() -> {
+ System.out.println();
+ System.out.println(">>> Printing '" + word + "' on this node from ignite job.");
+ });
+ }
+
+ exec.shutdown();
+
+ // Wait for all jobs to complete (0 means no limit).
+ exec.awaitTermination(0, TimeUnit.MILLISECONDS);
+
+ System.out.println();
+ System.out.println(">>> Check all nodes for output (this node is also part of the cluster).");
+ }
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datastructures/package-info.java
----------------------------------------------------------------------
diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datastructures/package-info.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datastructures/package-info.java
new file mode 100644
index 0000000..86f3423
--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/datastructures/package-info.java
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * <!-- Package description. -->
+ * Demonstrates using of blocking and non-blocking queues and atomic data structures.
+ */
+package org.apache.ignite.examples.java8.datastructures;
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/events/EventsExample.java
----------------------------------------------------------------------
diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/events/EventsExample.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/events/EventsExample.java
new file mode 100644
index 0000000..df2d52b
--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/events/EventsExample.java
@@ -0,0 +1,135 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.examples.java8.events;
+
+import java.util.UUID;
+import org.apache.ignite.Ignite;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.Ignition;
+import org.apache.ignite.compute.ComputeTaskSession;
+import org.apache.ignite.events.TaskEvent;
+import org.apache.ignite.examples.ExampleNodeStartup;
+import org.apache.ignite.lang.IgniteBiPredicate;
+import org.apache.ignite.lang.IgnitePredicate;
+import org.apache.ignite.lang.IgniteRunnable;
+import org.apache.ignite.resources.TaskSessionResource;
+
+import static org.apache.ignite.events.EventType.EVTS_TASK_EXECUTION;
+
+/**
+ * Demonstrates event consume API that allows to register event listeners on remote nodes.
+ * Note that ignite events are disabled by default and must be specifically enabled,
+ * just like in {@code examples/config/example-ignite.xml} file.
+ * <p>
+ * Remote nodes should always be started with configuration: {@code 'ignite.sh examples/config/example-ignite.xml'}.
+ * <p>
+ * Alternatively you can run {@link ExampleNodeStartup} in another JVM which will start
+ * node with {@code examples/config/example-ignite.xml} configuration.
+ */
+public class EventsExample {
+ /**
+ * Executes example.
+ *
+ * @param args Command line arguments, none required.
+ * @throws Exception If example execution failed.
+ */
+ public static void main(String[] args) throws Exception {
+ try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
+ System.out.println();
+ System.out.println(">>> Events API example started.");
+
+ // Listen to events happening on local node.
+ localListen();
+
+ // Listen to events happening on all cluster nodes.
+ remoteListen();
+
+ // Wait for a while while callback is notified about remaining puts.
+ Thread.sleep(1000);
+ }
+ }
+
+ /**
+ * Listen to events that happen only on local node.
+ *
+ * @throws IgniteException If failed.
+ */
+ private static void localListen() throws IgniteException {
+ System.out.println();
+ System.out.println(">>> Local event listener example.");
+
+ Ignite ignite = Ignition.ignite();
+
+ IgnitePredicate<TaskEvent> lsnr = evt -> {
+ System.out.println("Received task event [evt=" + evt.name() + ", taskName=" + evt.taskName() + ']');
+
+ return true; // Return true to continue listening.
+ };
+
+ // Register event listener for all local task execution events.
+ ignite.events().localListen(lsnr, EVTS_TASK_EXECUTION);
+
+ // Generate task events.
+ ignite.compute().withName("example-event-task").run(() -> System.out.println("Executing sample job."));
+
+ // Unsubscribe local task event listener.
+ ignite.events().stopLocalListen(lsnr);
+ }
+
+ /**
+ * Listen to events coming from all cluster nodes.
+ *
+ * @throws IgniteException If failed.
+ */
+ private static void remoteListen() throws IgniteException {
+ System.out.println();
+ System.out.println(">>> Remote event listener example.");
+
+ // This optional local callback is called for each event notification
+ // that passed remote predicate listener.
+ IgniteBiPredicate<UUID, TaskEvent> locLsnr = (nodeId, evt) -> {
+ // Remote filter only accepts tasks whose name being with "good-task" prefix.
+ assert evt.taskName().startsWith("good-task");
+
+ System.out.println("Received task event [evt=" + evt.name() + ", taskName=" + evt.taskName());
+
+ return true; // Return true to continue listening.
+ };
+
+ // Remote filter which only accepts tasks whose name begins with "good-task" prefix.
+ IgnitePredicate<TaskEvent> rmtLsnr = evt -> evt.taskName().startsWith("good-task");
+
+ Ignite ignite = Ignition.ignite();
+
+ // Register event listeners on all nodes to listen for task events.
+ ignite.events().remoteListen(locLsnr, rmtLsnr, EVTS_TASK_EXECUTION);
+
+ // Generate task events.
+ for (int i = 0; i < 10; i++) {
+ ignite.compute().withName(i < 5 ? "good-task-" + i : "bad-task-" + i).run(new IgniteRunnable() {
+ // Auto-inject task session.
+ @TaskSessionResource
+ private ComputeTaskSession ses;
+
+ @Override public void run() {
+ System.out.println("Executing sample job for task: " + ses.getTaskName());
+ }
+ });
+ }
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/events/package-info.java
----------------------------------------------------------------------
diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/events/package-info.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/events/package-info.java
new file mode 100644
index 0000000..b402e78
--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/events/package-info.java
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * <!-- Package description. -->
+ * Demonstrates events management API.
+ */
+package org.apache.ignite.examples.java8.events;
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/messaging/MessagingExample.java
----------------------------------------------------------------------
diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/messaging/MessagingExample.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/messaging/MessagingExample.java
new file mode 100644
index 0000000..8b88708
--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/messaging/MessagingExample.java
@@ -0,0 +1,166 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.examples.java8.messaging;
+
+import java.util.concurrent.CountDownLatch;
+import org.apache.ignite.Ignite;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.IgniteMessaging;
+import org.apache.ignite.Ignition;
+import org.apache.ignite.cluster.ClusterGroup;
+import org.apache.ignite.examples.ExampleNodeStartup;
+import org.apache.ignite.examples.ExamplesUtils;
+
+/**
+ * Example that demonstrates how to exchange messages between nodes. Use such
+ * functionality for cases when you need to communicate to other nodes outside
+ * of ignite task.
+ * <p>
+ * To run this example you must have at least one remote node started.
+ * <p>
+ * Remote nodes should always be started with special configuration file which
+ * enables P2P class loading: {@code 'ignite.{sh|bat} examples/config/example-ignite.xml'}.
+ * <p>
+ * Alternatively you can run {@link ExampleNodeStartup} in another JVM which will start node
+ * with {@code examples/config/example-ignite.xml} configuration.
+ */
+public final class MessagingExample {
+ /** Number of messages. */
+ private static final int MESSAGES_NUM = 10;
+
+ /** Message topics. */
+ private enum TOPIC { ORDERED, UNORDERED }
+
+ /**
+ * Executes example.
+ *
+ * @param args Command line arguments, none required.
+ * @throws IgniteException If example execution failed.
+ */
+ public static void main(String[] args) throws Exception {
+ try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
+ if (!ExamplesUtils.checkMinTopologySize(ignite.cluster(), 2)) {
+ System.out.println();
+ System.out.println(">>> Please start at least 2 cluster nodes to run example.");
+ System.out.println();
+
+ return;
+ }
+
+ System.out.println();
+ System.out.println(">>> Messaging example started.");
+
+ // Group for remote nodes.
+ ClusterGroup rmtGrp = ignite.cluster().forRemotes();
+
+ // Listen for messages from remote nodes to make sure that they received all the messages.
+ int msgCnt = rmtGrp.nodes().size() * MESSAGES_NUM;
+
+ CountDownLatch orderedLatch = new CountDownLatch(msgCnt);
+ CountDownLatch unorderedLatch = new CountDownLatch(msgCnt);
+
+ localListen(ignite.message(ignite.cluster().forLocal()), orderedLatch, unorderedLatch);
+
+ // Register listeners on all cluster nodes.
+ startListening(ignite, ignite.message(rmtGrp));
+
+ // Send unordered messages to all remote nodes.
+ for (int i = 0; i < MESSAGES_NUM; i++)
+ ignite.message(rmtGrp).send(TOPIC.UNORDERED, Integer.toString(i));
+
+ System.out.println(">>> Finished sending unordered messages.");
+
+ // Send ordered messages to all remote nodes.
+ for (int i = 0; i < MESSAGES_NUM; i++)
+ ignite.message(rmtGrp).sendOrdered(TOPIC.ORDERED, Integer.toString(i), 0);
+
+ System.out.println(">>> Finished sending ordered messages.");
+ System.out.println(">>> Check output on all nodes for message printouts.");
+ System.out.println(">>> Will wait for messages acknowledgements from all remote nodes.");
+
+ orderedLatch.await();
+ unorderedLatch.await();
+
+ System.out.println(">>> Messaging example finished.");
+ }
+ }
+
+ /**
+ * Start listening to messages on remote cluster nodes.
+ *
+ * @param ignite Ignite.
+ * @param imsg Ignite messaging.
+ * @throws IgniteException If failed.
+ */
+ private static void startListening(final Ignite ignite, IgniteMessaging imsg) throws IgniteException {
+ // Add ordered message listener.
+ imsg.remoteListen(TOPIC.ORDERED, (nodeId, msg) -> {
+ System.out.println("Received ordered message [msg=" + msg + ", fromNodeId=" + nodeId + ']');
+
+ try {
+ ignite.message(ignite.cluster().forNodeId(nodeId)).send(TOPIC.ORDERED, msg);
+ }
+ catch (IgniteException e) {
+ e.printStackTrace();
+ }
+
+ return true; // Return true to continue listening.
+ });
+
+ // Add unordered message listener.
+ imsg.remoteListen(TOPIC.UNORDERED, (nodeId, msg) -> {
+ System.out.println("Received unordered message [msg=" + msg + ", fromNodeId=" + nodeId + ']');
+
+ try {
+ ignite.message(ignite.cluster().forNodeId(nodeId)).send(TOPIC.UNORDERED, msg);
+ }
+ catch (IgniteException e) {
+ e.printStackTrace();
+ }
+
+ return true; // Return true to continue listening.
+ });
+ }
+
+ /**
+ * Listen for messages from remote nodes.
+ *
+ * @param imsg Ignite messaging.
+ * @param orderedLatch Latch for ordered messages acks.
+ * @param unorderedLatch Latch for unordered messages acks.
+ */
+ private static void localListen(
+ IgniteMessaging imsg,
+ final CountDownLatch orderedLatch,
+ final CountDownLatch unorderedLatch
+ ) {
+ imsg.localListen(TOPIC.ORDERED, (nodeId, msg) -> {
+ orderedLatch.countDown();
+
+ // Return true to continue listening, false to stop.
+ return orderedLatch.getCount() > 0;
+ });
+
+ imsg.localListen(TOPIC.UNORDERED, (nodeId, msg) -> {
+ unorderedLatch.countDown();
+
+ // Return true to continue listening, false to stop.
+ return unorderedLatch.getCount() > 0;
+ });
+ }
+}
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/messaging/MessagingPingPongExample.java
----------------------------------------------------------------------
diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/messaging/MessagingPingPongExample.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/messaging/MessagingPingPongExample.java
new file mode 100644
index 0000000..b19b476
--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/messaging/MessagingPingPongExample.java
@@ -0,0 +1,113 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.examples.java8.messaging;
+
+import java.util.concurrent.CountDownLatch;
+import org.apache.ignite.Ignite;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.Ignition;
+import org.apache.ignite.cluster.ClusterGroup;
+import org.apache.ignite.examples.ExampleNodeStartup;
+import org.apache.ignite.examples.ExamplesUtils;
+
+/**
+ * Demonstrates simple message exchange between local and remote nodes.
+ * <p>
+ * To run this example you must have at least one remote node started.
+ * <p>
+ * Remote nodes should always be started with special configuration file which
+ * enables P2P class loading: {@code 'ignite.{sh|bat} examples/config/example-ignite.xml'}.
+ * <p>
+ * Alternatively you can run {@link ExampleNodeStartup} in another JVM which will start node
+ * with {@code examples/config/example-ignite.xml} configuration.
+ */
+public class MessagingPingPongExample {
+ /**
+ * Executes example.
+ *
+ * @param args Command line arguments, none required.
+ * @throws Exception If example execution failed.
+ */
+ public static void main(String[] args) throws Exception {
+ // Game is played over the default ignite.
+ try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
+ if (!ExamplesUtils.checkMinTopologySize(ignite.cluster(), 2))
+ return;
+
+ System.out.println();
+ System.out.println(">>> Messaging ping-pong example started.");
+
+ // Pick random remote node as a partner.
+ ClusterGroup nodeB = ignite.cluster().forRemotes().forRandom();
+
+ // Note that both nodeA and nodeB will always point to
+ // same nodes regardless of whether they were implicitly
+ // serialized and deserialized on another node as part of
+ // anonymous closure's state during its remote execution.
+
+ // Set up remote player.
+ ignite.message(nodeB).remoteListen(null, (nodeId, rcvMsg) -> {
+ System.out.println("Received message [msg=" + rcvMsg + ", sender=" + nodeId + ']');
+
+ if ("PING".equals(rcvMsg)) {
+ ignite.message(ignite.cluster().forNodeId(nodeId)).send(null, "PONG");
+
+ return true; // Continue listening.
+ }
+
+ return false; // Unsubscribe.
+ });
+
+ int MAX_PLAYS = 10;
+
+ final CountDownLatch cnt = new CountDownLatch(MAX_PLAYS);
+
+ // Set up local player.
+ ignite.message().localListen(null, (nodeId, rcvMsg) -> {
+ System.out.println("Received message [msg=" + rcvMsg + ", sender=" + nodeId + ']');
+
+ if (cnt.getCount() == 1) {
+ ignite.message(ignite.cluster().forNodeId(nodeId)).send(null, "STOP");
+
+ cnt.countDown();
+
+ return false; // Stop listening.
+ }
+ else if ("PONG".equals(rcvMsg))
+ ignite.message(ignite.cluster().forNodeId(nodeId)).send(null, "PING");
+ else
+ throw new IgniteException("Received unexpected message: " + rcvMsg);
+
+ cnt.countDown();
+
+ return true; // Continue listening.
+ });
+
+ // Serve!
+ ignite.message(nodeB).send(null, "PING");
+
+ // Wait til the game is over.
+ try {
+ cnt.await();
+ }
+ catch (InterruptedException e) {
+ System.err.println("Hm... let us finish the game!\n" + e);
+ }
+ }
+ }
+}
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/messaging/package-info.java
----------------------------------------------------------------------
diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/messaging/package-info.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/messaging/package-info.java
new file mode 100644
index 0000000..75180cf
--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/messaging/package-info.java
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * <!-- Package description. -->
+ * Demonstrates how to exchange messages between nodes.
+ */
+package org.apache.ignite.examples.java8.messaging;
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/misc/schedule/ComputeScheduleExample.java
----------------------------------------------------------------------
diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/misc/schedule/ComputeScheduleExample.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/misc/schedule/ComputeScheduleExample.java
new file mode 100644
index 0000000..8c85a3e
--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/misc/schedule/ComputeScheduleExample.java
@@ -0,0 +1,68 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.examples.java8.misc.schedule;
+
+import org.apache.ignite.Ignite;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.Ignition;
+import org.apache.ignite.examples.ExampleNodeStartup;
+import org.apache.ignite.scheduler.SchedulerFuture;
+
+/**
+ * Demonstrates a cron-based {@link Runnable} execution scheduling.
+ * Test runnable object broadcasts a phrase to all cluster nodes every minute
+ * three times with initial scheduling delay equal to five seconds.
+ * <p>
+ * Remote nodes should always be started with special configuration file which
+ * enables P2P class loading: {@code 'ignite.{sh|bat} examples/config/example-ignite.xml'}.
+ * <p>
+ * Alternatively you can run {@link ExampleNodeStartup} in another JVM which will start node
+ * with {@code examples/config/example-ignite.xml} configuration.
+ */
+public class ComputeScheduleExample {
+ /**
+ * Executes example.
+ *
+ * @param args Command line arguments, none required.
+ * @throws IgniteException If example execution failed.
+ */
+ public static void main(String[] args) throws IgniteException {
+ try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
+ System.out.println();
+ System.out.println("Compute schedule example started.");
+
+ // Schedule output message every minute.
+ SchedulerFuture<?> fut = ignite.scheduler().scheduleLocal(() ->
+ ignite.compute().broadcast(() -> {
+ System.out.println();
+ System.out.println("Howdy! :)");
+
+ return "Howdy! :)";
+ }),
+ "{5, 3} * * * * *" // Cron expression.
+ );
+
+ while (!fut.isDone())
+ System.out.println(">>> Invocation result: " + fut.get());
+
+ System.out.println();
+ System.out.println(">>> Schedule future is done and has been unscheduled.");
+ System.out.println(">>> Check all nodes for hello message output.");
+ }
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/misc/schedule/package-info.java
----------------------------------------------------------------------
diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/misc/schedule/package-info.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/misc/schedule/package-info.java
new file mode 100644
index 0000000..42132f1
--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/misc/schedule/package-info.java
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * <!-- Package description. -->
+ * Demonstrates usage of cron-based scheduler.
+ */
+package org.apache.ignite.examples.java8.misc.schedule;
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/package-info.java
----------------------------------------------------------------------
diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/package-info.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/package-info.java
new file mode 100644
index 0000000..66847dc
--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/package-info.java
@@ -0,0 +1,23 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * <!-- Package description. -->
+ * Basic examples for ignite functionality utilizing Java8 lambdas.
+ * Use "java8" examples with JDK8 in addition to the "java" examples.
+ */
+package org.apache.ignite.examples.java8;
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/ignite/blob/c4b0877f/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/streaming/StreamTransformerExample.java
----------------------------------------------------------------------
diff --git a/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/streaming/StreamTransformerExample.java b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/streaming/StreamTransformerExample.java
new file mode 100644
index 0000000..538c4eb
--- /dev/null
+++ b/examples-lgpl/src/main/java8/org/apache/ignite/examples/java8/streaming/StreamTransformerExample.java
@@ -0,0 +1,101 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.examples.java8.streaming;
+
+import java.util.List;
+import java.util.Random;
+import org.apache.ignite.Ignite;
+import org.apache.ignite.IgniteCache;
+import org.apache.ignite.IgniteDataStreamer;
+import org.apache.ignite.Ignition;
+import org.apache.ignite.cache.query.SqlFieldsQuery;
+import org.apache.ignite.configuration.CacheConfiguration;
+import org.apache.ignite.examples.ExampleNodeStartup;
+import org.apache.ignite.examples.ExamplesUtils;
+import org.apache.ignite.stream.StreamTransformer;
+
+/**
+ * Stream random numbers into the streaming cache.
+ * To start the example, you should:
+ * <ul>
+ * <li>Start a few nodes using {@link ExampleNodeStartup} or by starting remote nodes as specified below.</li>
+ * <li>Start streaming using {@link StreamTransformerExample}.</li>
+ * </ul>
+ * <p>
+ * You should start remote nodes by running {@link ExampleNodeStartup} in another JVM.
+ */
+public class StreamTransformerExample {
+ /** Random number generator. */
+ private static final Random RAND = new Random();
+
+ /** Range within which to generate numbers. */
+ private static final int RANGE = 1000;
+
+ public static void main(String[] args) throws Exception {
+ // Mark this cluster member as client.
+ Ignition.setClientMode(true);
+
+ try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
+ if (!ExamplesUtils.hasServerNodes(ignite))
+ return;
+
+ CacheConfiguration<Integer, Long> cfg = new CacheConfiguration<>("randomNumbers");
+
+ // Index key and value.
+ cfg.setIndexedTypes(Integer.class, Long.class);
+
+ // Auto-close cache at the end of the example.
+ try (IgniteCache<Integer, Long> stmCache = ignite.getOrCreateCache(cfg)) {
+ try (IgniteDataStreamer<Integer, Long> stmr = ignite.dataStreamer(stmCache.getName())) {
+ // Allow data updates.
+ stmr.allowOverwrite(true);
+
+ // Configure data transformation to count random numbers added to the stream.
+ stmr.receiver(StreamTransformer.from((e, arg) -> {
+ // Get current count.
+ Long val = e.getValue();
+
+ // Increment count by 1.
+ e.setValue(val == null ? 1L : val + 1);
+
+ return null;
+ }));
+
+ // Stream 10 million of random numbers into the streamer cache.
+ for (int i = 1; i <= 10_000_000; i++) {
+ stmr.addData(RAND.nextInt(RANGE), 1L);
+
+ if (i % 500_000 == 0)
+ System.out.println("Number of tuples streamed into Ignite: " + i);
+ }
+ }
+
+ // Query top 10 most popular numbers every.
+ SqlFieldsQuery top10Qry = new SqlFieldsQuery("select _key, _val from Long order by _val desc limit 10");
+
+ // Execute queries.
+ List<List<?>> top10 = stmCache.query(top10Qry).getAll();
+
+ System.out.println("Top 10 most popular numbers:");
+
+ // Print top 10 words.
+ ExamplesUtils.printQueryResults(top10);
+ }
+ }
+ }
+}
\ No newline at end of file