Examples with ConcurrentHashMap java.util.concurrent.ConcurrentHashMap used on opensource projects

Example 46 with ConcurrentHashMap

use of java.util.concurrent.ConcurrentHashMap in project mapdb by jankotek.

the class ConcurrentHashMap8Test method testCompute.

/**
     * compute does not replace if the function returns null
     */
public void testCompute() {
    ConcurrentHashMap map = map5();
    map.compute(six, (x, y) -> null);
    assertFalse(map.containsKey(six));
}

Example 47 with ConcurrentHashMap

use of java.util.concurrent.ConcurrentHashMap in project mapdb by jankotek.

the class ConcurrentHashMap8Test method testComputeIfAbsent.

/**
     * computeIfAbsent adds when the given key is not present
     */
public void testComputeIfAbsent() {
    ConcurrentHashMap map = map5();
    map.computeIfAbsent(six, (x) -> "Z");
    assertTrue(map.containsKey(six));
}

Example 48 with ConcurrentHashMap

use of java.util.concurrent.ConcurrentHashMap in project mapdb by jankotek.

the class ConcurrentHashMap8Test method testComputeIfPresent2.

/**
     * computeIfPresent adds when the given key is not present
     */
public void testComputeIfPresent2() {
    ConcurrentHashMap map = map5();
    assertEquals("Z", map.computeIfPresent(one, (x, y) -> "Z"));
}

Example 49 with ConcurrentHashMap

use of java.util.concurrent.ConcurrentHashMap in project mapdb by jankotek.

the class ConcurrentHashMap8Test method testGetMappedValue.

/**
     * KeySetView.getMappedValue returns the map's mapped value
     */
public void testGetMappedValue() {
    ConcurrentHashMap map = map5();
    assertNull(map.keySet().getMappedValue());
    try {
        map.keySet(null);
        shouldThrow();
    } catch (NullPointerException success) {
    }
    ConcurrentHashMap.KeySetView set = map.keySet(one);
    assertFalse(set.add(one));
    assertTrue(set.add(six));
    assertTrue(set.add(seven));
    assertTrue(set.getMappedValue() == one);
    assertTrue(map.get(one) != one);
    assertTrue(map.get(six) == one);
    assertTrue(map.get(seven) == one);
}

Example 50 with ConcurrentHashMap

use of java.util.concurrent.ConcurrentHashMap in project mapdb by jankotek.

the class ConcurrentHashMap8Test method testComputeIfAbsent2.

/**
     * computeIfAbsent does not replace if the key is already present
     */
public void testComputeIfAbsent2() {
    ConcurrentHashMap map = map5();
    assertEquals("A", map.computeIfAbsent(one, (x) -> "Z"));
}