Java Code Examples for java.util.concurrent.ConcurrentMap#forEach()
The following examples show how to use
java.util.concurrent.ConcurrentMap#forEach() .
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Example 1
| Source File: ConcurrentRemoveIf.java From openjdk-jdk9 with GNU General Public License v2.0 | 6 votes |
|
private void testMap(ConcurrentMap<Integer, Integer> map, Consumer<ConcurrentMap<Integer, Integer>> action)
throws InterruptedException {
// put 0's
fillMap(map, 0);
// To start working simultaneously
CyclicBarrier threadStarted = new CyclicBarrier(2);
// This task puts 1's into map
CompletableFuture<Void> putter = CompletableFuture.runAsync(
awaitOn(threadStarted, () -> fillMap(map, 1)),
executorService);
// This task performs the map action to remove all 0's from map
CompletableFuture<Void> remover = CompletableFuture.runAsync(
awaitOn(threadStarted, () -> action.accept(map)),
executorService);
// Wait for both tasks to complete
CompletableFuture.allOf(putter, remover).join();
assertEquals(map.size(), SIZE, "Map size incorrect");
map.forEach((k, v) -> assertEquals(v, (Integer)1));
}
Example 2
| Source File: HttpHandler.java From smartacus-mqtt-broker with Apache License 2.0 | 5 votes |
|
private void getTopics(ChannelHandlerContext ctx, FullHttpRequest req) {
ArrayList<TopicVO> vos = new ArrayList<>();
ConcurrentMap<String, List<ClientSub>> topicSubers = PostMan.topicSubers;
if(null !=topicSubers && !topicSubers.isEmpty()){
topicSubers.forEach((k,v)->{
TopicVO vo=new TopicVO();
vo.setTopic(k);
List<SubClient> scList= Lists.newArrayList();
if(!v.isEmpty()){
v.forEach(e->{
SubClient client=new SubClient();
client.setClientId(e.getClientId());
client.setQos(e.getSubQos());
scList.add(client);
});
}
vo.setClientList(scList);
vos.add(vo);
});
}
// 1.设置响应
Result result= new Result<Object>().ok(vos);
FullHttpResponse resp = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1,
HttpResponseStatus.OK,
Unpooled.copiedBuffer(JSONObject.toJSONString(result), CharsetUtil.UTF_8));
resp.headers().set(HttpHeaderNames.CONTENT_TYPE, "text/html; charset=UTF-8");
// 2.发送
// 注意必须在使用完之后，close channel
ctx.writeAndFlush(resp).addListener(ChannelFutureListener.CLOSE);
}
Example 3
| Source File: DefaultOvsdbClient.java From onos with Apache License 2.0 | 5 votes |
|
/**
* Helper method which retrieves mirrorings statistics using bridge uuid.
*
* @param bridgeUuid the uuid of the bridge
* @return the list of the mirrorings statistics.
*/
private List<MirroringStatistics> getMirrorings(Uuid bridgeUuid) {
DatabaseSchema dbSchema = schema.get(DATABASENAME);
if (dbSchema == null) {
log.warn("Unable to retrieve dbSchema {}", DATABASENAME);
return null;
}
OvsdbRowStore rowStore = getRowStore(DATABASENAME, BRIDGE);
if (rowStore == null) {
log.warn("Unable to retrieve rowStore {} of {}", BRIDGE, DATABASENAME);
return null;
}
Row bridgeRow = rowStore.getRow(bridgeUuid.value());
Bridge bridge = (Bridge) TableGenerator.
getTable(dbSchema, bridgeRow, OvsdbTable.BRIDGE);
Set<Uuid> mirroringsUuids = (Set<Uuid>) ((OvsdbSet) bridge
.getMirrorsColumn().data()).set();
OvsdbRowStore mirrorRowStore = getRowStore(DATABASENAME, MIRROR);
if (mirrorRowStore == null) {
log.warn("Unable to retrieve rowStore {} of {}", MIRROR, DATABASENAME);
return null;
}
List<MirroringStatistics> mirroringStatistics = new ArrayList<>();
ConcurrentMap<String, Row> mirrorTableRows = mirrorRowStore.getRowStore();
mirrorTableRows.forEach((key, row) -> {
if (!mirroringsUuids.contains(Uuid.uuid(key))) {
return;
}
Mirror mirror = (Mirror) TableGenerator
.getTable(dbSchema, row, OvsdbTable.MIRROR);
mirroringStatistics.add(MirroringStatistics.mirroringStatistics(mirror.getName(),
(Map<String, Integer>) ((OvsdbMap) mirror
.getStatisticsColumn().data()).map()));
});
return ImmutableList.copyOf(mirroringStatistics);
}
Example 4
| Source File: DefaultOvsdbClient.java From onos with Apache License 2.0 | 5 votes |
|
private List<Controller> getControllers(Uuid bridgeUuid) {
DatabaseSchema dbSchema = schema.get(DATABASENAME);
if (dbSchema == null) {
return null;
}
OvsdbRowStore rowStore = getRowStore(DATABASENAME, BRIDGE);
if (rowStore == null) {
log.debug("There is no bridge table");
return null;
}
Row bridgeRow = rowStore.getRow(bridgeUuid.value());
Bridge bridge = (Bridge) TableGenerator.
getTable(dbSchema, bridgeRow, OvsdbTable.BRIDGE);
//FIXME remove log
log.warn("type of controller column", bridge.getControllerColumn()
.data().getClass());
Set<Uuid> controllerUuids = (Set<Uuid>) ((OvsdbSet) bridge
.getControllerColumn().data()).set();
OvsdbRowStore controllerRowStore = getRowStore(DATABASENAME, CONTROLLER);
if (controllerRowStore == null) {
log.debug("There is no controller table");
return null;
}
List<Controller> ovsdbControllers = new ArrayList<>();
ConcurrentMap<String, Row> controllerTableRows = controllerRowStore.getRowStore();
controllerTableRows.forEach((key, row) -> {
if (!controllerUuids.contains(Uuid.uuid(key))) {
return;
}
Controller controller = (Controller) TableGenerator
.getTable(dbSchema, row, OvsdbTable.CONTROLLER);
ovsdbControllers.add(controller);
});
return ovsdbControllers;
}
Example 5
| Source File: Lesson2.java From Java-Concurrency-Multithreading-in-Practice with MIT License | 4 votes |
|
private static void demoConcurrentHashMap() throws InterruptedException {
Random random = new Random();
ExecutorService service = Executors.newCachedThreadPool();
String brandNewShoes = "Brand new shows";
String oldPhone = "Old phone";
String leatherHat = "Leather hat";
String cowboyShoes = "Cowboy shoes";
ConcurrentMap<String, String> itemToBuyerMap = new ConcurrentHashMap<>();
BiConsumer<String, String> buyItemIfNotTaken = (buyer, item) -> {
try {
TimeUnit.MILLISECONDS.sleep(random.nextInt(1000));
itemToBuyerMap.putIfAbsent(item, buyer);
} catch (Exception e) {
e.printStackTrace();
}
};
service.submit(() -> {
buyItemIfNotTaken.accept("Alice", brandNewShoes);
buyItemIfNotTaken.accept("Alice", cowboyShoes);
buyItemIfNotTaken.accept("Alice", leatherHat);
});
service.submit(() -> {
buyItemIfNotTaken.accept("Bob", brandNewShoes);
buyItemIfNotTaken.accept("Bob", cowboyShoes);
buyItemIfNotTaken.accept("Bob", leatherHat);
});
service.submit(() -> {
buyItemIfNotTaken.accept("Carol", brandNewShoes);
buyItemIfNotTaken.accept("Carol", cowboyShoes);
buyItemIfNotTaken.accept("Carol", leatherHat);
});
service.awaitTermination(2000, TimeUnit.MILLISECONDS);
itemToBuyerMap
.forEach((item, buyer) -> System.out.printf("%s bought by %s%n", item, buyer));
}
Example 6
| Source File: PeerExchange_IT.java From bt with Apache License 2.0 | 4 votes |
|
public void testPeerExchange() {
ConcurrentMap<Peer, Set<ConnectionKey>> discoveredPeers = new ConcurrentHashMap<>();
swarm.getSeeders().forEach(seeder ->
seeder.getHandle().startAsync(state -> {
Set<ConnectionKey> peerPeers = discoveredPeers.get(seeder.getPeer());
if (peerPeers == null) {
peerPeers = ConcurrentHashMap.newKeySet();
Set<ConnectionKey> existing = discoveredPeers.putIfAbsent(seeder.getPeer(), peerPeers);
if (existing != null) {
peerPeers = existing;
}
}
peerPeers.addAll(state.getConnectedPeers());
}, 1000));
try {
Thread.sleep(20000L);
} catch (InterruptedException e) {
throw new RuntimeException("Test unexpectedly interrupted", e);
}
Set<Peer> swarmPeers = new HashSet<>();
swarmPeers.addAll(swarm.getSeeders().stream().map(SwarmPeer::getPeer).collect(Collectors.toSet()));
LOGGER.info("Swarm peers:");
swarmPeers.forEach(peer -> {
LOGGER.info("{} ({})", peer, peer.getClass());
});
assertTrue(discoveredPeers.keySet().containsAll(swarmPeers));
discoveredPeers.forEach((peer, peers) -> {
LOGGER.info("Peer {} discovered the following peers:", peer);
peers.forEach(discoveredPeer -> {
LOGGER.info("{} ({})", discoveredPeer, discoveredPeer.getClass());
});
for (Peer swarmPeer : swarmPeers) {
// TODO: this must be updated after switching to ConnectionKeys
// assertContainsPeer(peers, swarmPeer);
}
});
}
