/
CachePutGetExample.java
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/
CachePutGetExample.java
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/*
* 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.gridgain.examples.datagrid;
import org.apache.ignite.*;
import org.apache.ignite.cache.*;
import java.util.*;
/**
* This example demonstrates very basic operations on cache, such as 'put' and 'get'.
* <p>
* Remote nodes should always be started with special configuration file which
* enables P2P class loading: {@code 'ggstart.{sh|bat} examples/config/example-cache.xml'}.
* <p>
* Alternatively you can run {@link CacheNodeStartup} in another JVM which will
* start GridGain node with {@code examples/config/example-cache.xml} configuration.
*/
public class CachePutGetExample {
/** Cache name. */
private static final String CACHE_NAME = "partitioned";
/**
* Executes example.
*
* @param args Command line arguments, none required.
* @throws IgniteCheckedException If example execution failed.
*/
public static void main(String[] args) throws Exception {
try (Ignite g = Ignition.start("examples/config/example-cache.xml")) {
// Clean up caches on all nodes before run.
g.cache(CACHE_NAME).globalClearAll(0);
// Individual puts and gets.
putGet();
// Bulk puts and gets.
putAllGetAll();
}
}
/**
* Execute individual puts and gets.
*
* @throws IgniteCheckedException If failed.
*/
private static void putGet() throws IgniteCheckedException {
System.out.println();
System.out.println(">>> Cache put-get example started.");
Ignite g = Ignition.ignite();
final GridCache<Integer, String> cache = g.cache(CACHE_NAME);
final int keyCnt = 20;
// Store keys in cache.
for (int i = 0; i < keyCnt; i++)
cache.putx(i, Integer.toString(i));
System.out.println(">>> Stored values in cache.");
for (int i = 0; i < keyCnt; i++)
System.out.println("Got [key=" + i + ", val=" + cache.get(i) + ']');
}
/**
* Execute bulk {@code putAll(...)} and {@code getAll(...)} operations.
*
* @throws IgniteCheckedException If failed.
*/
private static void putAllGetAll() throws IgniteCheckedException {
System.out.println();
System.out.println(">>> Starting putAll-getAll example.");
Ignite g = Ignition.ignite();
final GridCache<Integer, String> cache = g.cache(CACHE_NAME);
final int keyCnt = 20;
// Create batch.
Map<Integer, String> batch = new HashMap<>();
for (int i = 0; i < keyCnt; i++)
batch.put(i, "bulk-" + Integer.toString(i));
// Bulk-store entries in cache.
cache.putAll(batch);
System.out.println(">>> Bulk-stored values in cache.");
// Bulk-get values from cache.
Map<Integer, String> vals = cache.getAll(batch.keySet());
for (Map.Entry<Integer, String> e : vals.entrySet())
System.out.println("Got entry [key=" + e.getKey() + ", val=" + e.getValue() + ']');
}
}