Java Code Examples for java.util.concurrent.ConcurrentHashMap.search()

The following are Jave code examples for showing how to use search() of the java.util.concurrent.ConcurrentHashMap class. You can vote up the examples you like. Your votes will be used in our system to get more good examples.
+ Save this method
Example 1
Project: Java-9-Concurrency-Cookbook-Second-Edition   File: Main.java   View Source Code Vote up 5 votes
public static void main(String[] args) {

		ConcurrentHashMap<String, ConcurrentLinkedDeque<Operation>> userHash = new ConcurrentHashMap<>();
		HashFiller hashFiller = new HashFiller(userHash);

		Thread[] threads = new Thread[10];
		for (int i = 0; i < 10; i++) {
			threads[i] = new Thread(hashFiller);
			threads[i].start();
		}

		for (int i = 0; i < 10; i++) {
			try {
				threads[i].join();
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}

		System.out.printf("Size: %d\n", userHash.size());

		userHash.forEach(10, (user, list) -> {
			System.out.printf("%s: %s: %d\n", Thread.currentThread().getName(), user, list.size());
		});

		userHash.forEachEntry(10, entry -> {
			System.out.printf("%s: %s: %d\n", Thread.currentThread().getName(), entry.getKey(),
					entry.getValue().size());
		});

		Operation op = userHash.search(10, (user, list) -> {
			for (Operation operation : list) {
				if (operation.getOperation().endsWith("1")) {
					return operation;
				}
			}
			return null;
		});

		System.out.printf("The operation we have found is: %s, %s, %s,\n", op.getUser(), op.getOperation(),
				op.getTime());

		ConcurrentLinkedDeque<Operation> operations = userHash.search(10, (user, list) -> {
			if (list.size() > 10) {
				return list;
			}
			return null;
		});

		System.out.printf("The user we have found is: %s: %d operations\n", operations.getFirst().getUser(),
				operations.size());

		int totalSize = userHash.reduce(10, (user, list) -> {
			return list.size();
		}, (n1, n2) -> {
			return n1 + n2;
		});

		System.out.printf("The total size is: %d\n", totalSize);

	}
 
Example 2
Project: Java-SE-9-Road-to-Concurrent-and-High-Performance-Programming   File: Main.java   View Source Code Vote up 5 votes
public static void main(String[] args) {

		ConcurrentHashMap<String, ConcurrentLinkedDeque<Operation>> userHash = new ConcurrentHashMap<>();
		HashFiller hashFiller = new HashFiller(userHash);

		Thread[] threads = new Thread[10];
		for (int i = 0; i < 10; i++) {
			threads[i] = new Thread(hashFiller);
			threads[i].start();
		}

		for (int i = 0; i < 10; i++) {
			try {
				threads[i].join();
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}

		System.out.printf("Size: %d\n", userHash.size());

		userHash.forEach(10, (user, list) -> {
			System.out.printf("%s: %s: %d\n", Thread.currentThread().getName(), user, list.size());
		});

		userHash.forEachEntry(10, entry -> {
			System.out.printf("%s: %s: %d\n", Thread.currentThread().getName(), entry.getKey(),
					entry.getValue().size());
		});

		Operation op = userHash.search(10, (user, list) -> {
			for (Operation operation : list) {
				if (operation.getOperation().endsWith("1")) {
					return operation;
				}
			}
			return null;
		});

		System.out.printf("The operation we have found is: %s, %s, %s,\n", op.getUser(), op.getOperation(),
				op.getTime());

		ConcurrentLinkedDeque<Operation> operations = userHash.search(10, (user, list) -> {
			if (list.size() > 10) {
				return list;
			}
			return null;
		});

		System.out.printf("The user we have found is: %s: %d operations\n", operations.getFirst().getUser(),
				operations.size());

		int totalSize = userHash.reduce(10, (user, list) -> {
			return list.size();
		}, (n1, n2) -> {
			return n1 + n2;
		});

		System.out.printf("The total size is: %d\n", totalSize);

	}