TextCacheDumpCommand.java

package net.rubyeye.xmemcached.command.text;

import java.nio.ByteBuffer;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.CountDownLatch;

import net.rubyeye.xmemcached.command.Command;
import net.rubyeye.xmemcached.command.CommandType;
import net.rubyeye.xmemcached.impl.MemcachedTCPSession;
import net.rubyeye.xmemcached.networking.MemcachedSession;
import net.rubyeye.xmemcached.utils.ByteUtils;

import com.google.code.yanf4j.buffer.IoBuffer;

public class TextCacheDumpCommand extends Command {
	public static final String CACHE_DUMP_COMMAND = "stats cachedump %d 0\r\n";
	private int itemNumber;

	public final int getItemNumber() {
		return this.itemNumber;
	}

	public final void setItemNumber(int itemNumber) {
		this.itemNumber = itemNumber;
	}

	public TextCacheDumpCommand(CountDownLatch latch, int itemNumber) {
		super("stats", (byte[]) null, latch);
		this.commandType = CommandType.STATS;
		this.result = new LinkedList<String>();
		this.itemNumber = itemNumber;
	}

	@Override
	@SuppressWarnings("unchecked")
	public final boolean decode(MemcachedTCPSession session, ByteBuffer buffer) {
		String line = null;
		while ((line = ByteUtils.nextLine(buffer)) != null) {
			if (line.equals("END")) { // at the end
				return done(session);
			} else if (line.startsWith("ITEM")) {
				String[] items = line.split(" ");
				((List<String>) getResult()).add(items[1]);
			} else {
				return decodeError(line);
			}
		}
		return false;
	}

	private final boolean done(MemcachedSession session) {
		countDownLatch();
		return true;
	}

	@Override
	public final void encode() {
		String result = String.format(CACHE_DUMP_COMMAND, this.itemNumber);
		this.ioBuffer = IoBuffer
				.wrap(ByteBuffer.wrap(result.getBytes()));
	}
}