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/*
 * DISCLAIMER
 *
 * Copyright 2018 ArangoDB GmbH, Cologne, Germany
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Copyright holder is ArangoDB GmbH, Cologne, Germany
 */

package com.arangodb.internal.net;

import java.io.IOException;

/**
 * @author Mark Vollmary
 *
 */
public class DirtyReadHostHandler implements HostHandler {

	private final HostHandler master;
	private final HostHandler follower;
	private AccessType currentAccessType;

	public DirtyReadHostHandler(final HostHandler master, final HostHandler follower) {
		super();
		this.master = master;
		this.follower = follower;
	}

	private HostHandler determineHostHandler() {
		if (currentAccessType == AccessType.DIRTY_READ) {
			return follower;
		}
		return master;
	}

	@Override
	public Host get(final HostHandle hostHandle, final AccessType accessType) {
		this.currentAccessType = accessType;
		return determineHostHandler().get(hostHandle, accessType);
	}

	@Override
	public void success() {
		determineHostHandler().success();
	}

	@Override
	public void fail() {
		determineHostHandler().fail();
	}

	@Override
	public void reset() {
		determineHostHandler().reset();
	}

	@Override
	public void confirm() {
		determineHostHandler().confirm();
	}

	@Override
	public void close() throws IOException {
		master.close();
		follower.close();
	}

	@Override
	public void closeCurrentOnError() {
		determineHostHandler().closeCurrentOnError();
	}

}