Examples of java.nio.channels.Selector.selectedKeys()

java.nio.channels.Selector.selectedKeys()
Returns this selector's selected-key set.
Keys may be removed from, but not directly added to, the selected-key set. Any attempt to add an object to the key set will cause an {@link UnsupportedOperationException} to be thrown.
The selected-key set is not thread-safe.
@return This selector's selected-key set @throws ClosedSelectorException If this selector is closed

                // from acquiring its lock.
            }
            try {
                int selectedKeyCount = selector.select(500);
                if (selectedKeyCount > 0) {
                    processSelectedKeys(selector.selectedKeys());
                }


                if (selector.keys().isEmpty()) {
                    if (shutdown) {
                        try {

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            if (selectedKeys == 0) {
                continue;
            }


            Iterator it = selector.selectedKeys().iterator();
            while (it.hasNext()) {
                SelectionKey sk = (SelectionKey) it.next();
                it.remove();
                try {
                    int readyOps = sk.readyOps();

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                } catch (Throwable t) {
                    t.printStackTrace();
                    return;
                }
            }
            selector.selectedKeys().clear();
        }
        System.out.println("Complete, sleeping 15 seconds");
        Thread.sleep(15000);
    }
}

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            if (selectedKeys == 0) {
                continue;
            }


            Iterator it = selector.selectedKeys().iterator();
            while (it.hasNext()) {
                SelectionKey sk = (SelectionKey) it.next();
                it.remove();
                try {
                    int readyOps = sk.readyOps();

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                }


                cancelledKeys = 0;
                processRegisterTaskQueue();
                processWriteTaskQueue();
                processSelectedKeys(selector.selectedKeys());


                // Exit the loop when there's nothing to handle.
                // The shutdown flag is used to delay the shutdown of this
                // loop to avoid excessive Selector creation when
                // connections are registered in a one-by-one manner instead of

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                    }


                    processRegisterTaskQueue();


                    if (selectedKeyCount > 0) {
                        processSelectedKeys(selector.selectedKeys());
                    }


                    // Handle connection timeout every 0.5 seconds approximately.
                    long currentTimeNanos = System.nanoTime();
                    if (currentTimeNanos - lastConnectTimeoutCheckTimeNanos >= 500 * 1000000L) {

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                // from acquiring its lock.
            }
            try {
                int selectedKeyCount = selector.select(500);
                if (selectedKeyCount > 0) {
                    processSelectedKeys(selector.selectedKeys());
                }


                // Exit the loop when there's nothing to handle.
                // The shutdown flag is used to delay the shutdown of this
                // loop to avoid excessive Selector creation when

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                    // from acquiring its lock.
                }
                try {
                    int selectedKeyCount = selector.select(500);
                    if (selectedKeyCount > 0) {
                        processSelectedKeys(selector.selectedKeys());
                    }


                    // Exit the loop when there's nothing to handle.
                    // The shutdown flag is used to delay the shutdown of this
                    // loop to avoid excessive Selector creation when

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                processRegisterTaskQueue();
                processWriteTaskQueue();


                if (selectedKeyCount > 0) {
                    processSelectedKeys(selector.selectedKeys());
                }


                // Exit the loop when there's nothing to handle.
                // The shutdown flag is used to delay the shutdown of this
                // loop to avoid excessive Selector creation when

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                    }


                    processRegisterTaskQueue();


                    if (selectedKeyCount > 0) {
                        processSelectedKeys(selector.selectedKeys());
                    }


                    // Exit the loop when there's nothing to handle.
                    // The shutdown flag is used to delay the shutdown of this
                    // loop to avoid excessive Selector creation when

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