Example usage for java.util.concurrent ConcurrentMap remove

Introduction

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

Prototype

boolean remove(Object key, Object value);

Source Link

Document

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

Usage

From source file:Main.java

public static void main(String[] args) {
    ConcurrentMap<String, String> cMap = new ConcurrentHashMap<>();
    cMap.put("A", "A");

    System.out.println("Concurrent Map: " + cMap);

    System.out.println(cMap.putIfAbsent("A", "1"));
    System.out.println(cMap.putIfAbsent("B", "B"));
    System.out.println(cMap.remove("A", "B"));
    System.out.println(cMap.replace("A", "B"));

    System.out.println("Concurrent Map: " + cMap);
}

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From source file:com.yahoo.pulsar.client.impl.ConnectionPool.java

private void cleanupConnection(InetSocketAddress address, int connectionKey,
        CompletableFuture<ClientCnx> connectionFuture) {
    ConcurrentMap<Integer, CompletableFuture<ClientCnx>> map = pool.get(address);
    if (map != null) {
        map.remove(connectionKey, connectionFuture);
    }//from   w w w  .j  a  v  a 2s.  co  m
}

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From source file:org.apache.hadoop.hbase.client.MetaCache.java

/**
 * Delete a cached location, no matter what it is. Called when we were told to not use cache.
 * @param tableName tableName//  ww  w.j  a v a 2 s.c o m
 * @param row
 */
public void clearCache(final TableName tableName, final byte[] row) {
    ConcurrentMap<byte[], RegionLocations> tableLocations = getTableLocations(tableName);

    RegionLocations regionLocations = getCachedLocation(tableName, row);
    if (regionLocations != null) {
        byte[] startKey = regionLocations.getRegionLocation().getRegionInfo().getStartKey();
        boolean removed = tableLocations.remove(startKey, regionLocations);
        if (removed && LOG.isTraceEnabled()) {
            LOG.trace("Removed " + regionLocations + " from cache");
        }
    }
}

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

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

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

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

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

@Test(dataProvider = "warmedMap")
public void removeConditionally_withNullValue(ConcurrentMap<Integer, Integer> map) {
    assertThat(map.remove(1, null), is(false)); // matches CHM
}

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

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

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

@Test(dataProvider = "guardedMap")
public void removeConditionally(ConcurrentMap<Integer, Integer> map) {
    map.put(1, 2);//from   ww  w .  j  ava 2s  .  c  o  m
    assertThat(map.remove(1, -2), is(false));
    assertThat(map.remove(1, 2), is(true));
    assertThat(map.get(1), is(nullValue()));
    assertThat(map.containsKey(1), is(false));
    assertThat(map.containsValue(2), is(false));
    assertThat(map, is(emptyMap()));
}

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From source file:org.apache.hadoop.hbase.client.MetaCache.java

public void clearCache(final HRegionLocation location) {
    if (location == null) {
        return;//w  ww. j av  a 2  s .  c  om
    }
    TableName tableName = location.getRegionInfo().getTable();
    ConcurrentMap<byte[], RegionLocations> tableLocations = getTableLocations(tableName);
    RegionLocations regionLocations = tableLocations.get(location.getRegionInfo().getStartKey());
    if (regionLocations != null) {
        RegionLocations updatedLocations = regionLocations.remove(location);
        boolean removed = false;
        if (updatedLocations != regionLocations) {
            if (updatedLocations.isEmpty()) {
                removed = tableLocations.remove(location.getRegionInfo().getStartKey(), regionLocations);
            } else {
                removed = tableLocations.replace(location.getRegionInfo().getStartKey(), regionLocations,
                        updatedLocations);
            }
            if (removed && LOG.isTraceEnabled()) {
                LOG.trace("Removed " + location + " from cache");
            }
        }
    }
}

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From source file:org.apache.hadoop.hbase.client.MetaCache.java

/**
 * Delete a cached location for a table, row and server
 *///from   ww w  .  j ava2 s  .com
public void clearCache(final TableName tableName, final byte[] row, ServerName serverName) {
    ConcurrentMap<byte[], RegionLocations> tableLocations = getTableLocations(tableName);

    RegionLocations regionLocations = getCachedLocation(tableName, row);
    if (regionLocations != null) {
        RegionLocations updatedLocations = regionLocations.removeByServer(serverName);
        if (updatedLocations != regionLocations) {
            byte[] startKey = regionLocations.getRegionLocation().getRegionInfo().getStartKey();
            boolean removed = false;
            if (updatedLocations.isEmpty()) {
                removed = tableLocations.remove(startKey, regionLocations);
            } else {
                removed = tableLocations.replace(startKey, regionLocations, updatedLocations);
            }
            if (removed && LOG.isTraceEnabled()) {
                LOG.trace("Removed locations of table: " + tableName + " ,row: " + Bytes.toString(row)
                        + " mapping to server: " + serverName + " from cache");
            }
        }
    }
}

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