Example usage for java.util.concurrent ConcurrentMap replace

Introduction

In this page you can find the example usage for java.util.concurrent ConcurrentMap replace.

Prototype

boolean replace(K key, V oldValue, V newValue);

Source Link

Document

Replaces the entry for a key only if currently mapped to a given value.

Usage

From source file:Main.java

/**
 * Replaces the entry for a key only if currently mapped to a given value.
 *
 * @param map       The map to be operated on.
 * @param key       The key with which the specified value is associated.
 * @param oldValue  The value expected to be associated with the specified key.
 * @param newValue  The value to be associated with the specified key.
 * @param <K>       The class of keys in this map.
 * @param <V>       The class of values in the map.
 * @return          True if the value was replaced.
 */// w  ww .j  a v  a2  s.  c  o m
public static <K, V> boolean replace(ConcurrentMap<K, V> map, K key, V oldValue, V newValue) {
    return map != null && map.replace(key, oldValue, newValue);
}

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From source file:com.ejisto.event.listener.SessionRecorderManager.java

private <K, V> boolean replace(K key, ConcurrentMap<K, Set<V>> container, Set<V> newValue) {
    int counter = 10;
    while (counter-- > 0) {
        Set<V> currentValue = container.get(key);
        Set<V> copy = new HashSet<>(currentValue);
        copy.addAll(newValue);//from  www. j a v a 2 s .  c om
        if (container.replace(key, currentValue, copy)) {
            return true;
        }
    }
    return false;
}

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From source file:com.googlecode.concurrentlinkedhashmap.ConcurrentMapTest.java

@Test(dataProvider = "guardedMap", expectedExceptions = NullPointerException.class)
public void replaceConditionally_withNullKey(ConcurrentMap<Integer, Integer> map) {
    map.replace(null, 2, 3);
}

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From source file:com.googlecode.concurrentlinkedhashmap.ConcurrentMapTest.java

@Test(dataProvider = "guardedMap", expectedExceptions = NullPointerException.class)
public void replaceConditionally_withNullOldValue(ConcurrentMap<Integer, Integer> map) {
    map.replace(1, null, 3);
}

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From source file:com.googlecode.concurrentlinkedhashmap.ConcurrentMapTest.java

@Test(dataProvider = "guardedMap", expectedExceptions = NullPointerException.class)
public void replaceConditionally_withNullNewValue(ConcurrentMap<Integer, Integer> map) {
    map.replace(1, 2, null);
}

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From source file:com.googlecode.concurrentlinkedhashmap.ConcurrentMapTest.java

@Test(dataProvider = "guardedMap", expectedExceptions = NullPointerException.class)
public void replaceConditionally_withNullKeyAndOldValue(ConcurrentMap<Integer, Integer> map) {
    map.replace(null, null, 3);
}

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From source file:com.googlecode.concurrentlinkedhashmap.ConcurrentMapTest.java

@Test(dataProvider = "guardedMap", expectedExceptions = NullPointerException.class)
public void replaceConditionally_withNullKeyAndNewValue(ConcurrentMap<Integer, Integer> map) {
    map.replace(null, 2, null);
}

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From source file:com.googlecode.concurrentlinkedhashmap.ConcurrentMapTest.java

@Test(dataProvider = "guardedMap", expectedExceptions = NullPointerException.class)
public void replaceConditionally_withNullOldAndNewValue(ConcurrentMap<Integer, Integer> map) {
    map.replace(1, null, null);
}

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From source file:com.googlecode.concurrentlinkedhashmap.ConcurrentMapTest.java

@Test(dataProvider = "guardedMap", expectedExceptions = NullPointerException.class)
public void replaceConditionally_withNullKeyAndValues(ConcurrentMap<Integer, Integer> map) {
    map.replace(null, null, null);
}

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From source file:com.googlecode.concurrentlinkedhashmap.ConcurrentMapTest.java

@Test(dataProvider = "guardedMap")
public void replaceConditionally_whenEmpty(ConcurrentMap<Integer, Integer> map) {
    assertThat(map.replace(1, 2, 3), is(false));
}

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