com.dianping.cat.message.internal.MessageId Maven / Gradle / Ivy

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/*
 * Copyright (c) 2011-2018, Meituan Dianping. All Rights Reserved.
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */
package com.dianping.cat.message.internal;

import org.unidal.lookup.util.StringUtils;

public class MessageId {
	private String m_domain;

	private String m_ipAddressInHex;

	private int m_hour;

	private int m_index;

	public MessageId(String domain, String ipAddressInHex, int hour, int index) {
		m_domain = domain;
		m_ipAddressInHex = ipAddressInHex;
		m_hour = hour;
		m_index = index;
	}

	public static MessageId parse(String messageId) {
		int index = -1;
		int hour = -1;
		String ipAddressInHex = null;
		String domain = null;
		int len = messageId.length();
		int part = 4;
		int end = len;

		for (int i = len - 1; i >= 0; i--) {
			char ch = messageId.charAt(i);

			if (ch == '-') {
				switch (part) {
				case 4:
					index = Integer.parseInt(messageId.substring(i + 1, end));
					end = i;
					part--;
					break;
				case 3:
					hour = Integer.parseInt(messageId.substring(i + 1, end));
					end = i;
					part--;
					break;
				case 2:
					ipAddressInHex = messageId.substring(i + 1, end);
					domain = messageId.substring(0, i);
					part--;
					break;
				default:
					break;
				}
			}
		}

		if (domain == null || ipAddressInHex == null || hour < 0 || index < 0) {
			throw new RuntimeException("Invalid message ID format: " + messageId);
		} else {
			return new MessageId(domain, ipAddressInHex, hour, index);
		}
	}

	@Override
	public boolean equals(Object obj) {
		if (obj instanceof MessageId) {
			MessageId o = (MessageId) obj;

			if (!m_domain.equals(o.m_domain)) {
				return false;
			}

			if (!m_ipAddressInHex.equals(o.m_ipAddressInHex)) {
				return false;
			}

			if (m_hour != o.m_hour) {
				return false;
			}

			if (m_index != o.m_index) {
				return false;
			}

			return true;
		}

		return false;
	}

	public String getDomain() {
		return m_domain;
	}

	public int getHour() {
		return m_hour;
	}

	public int getIndex() {
		return m_index;
	}

	public String getIpAddress() {
		StringBuilder sb = new StringBuilder();
		String local = m_ipAddressInHex;
		int index = local.lastIndexOf(".");

		if (index > 0) {
			local = local.substring(0, index);
		}

		int length = local.length();

		for (int i = 0; i < length; i += 2) {
			char ch1 = local.charAt(i);
			char ch2 = local.charAt(i + 1);
			int value = 0;

			if (ch1 >= '0' && ch1 <= '9') {
				value += (ch1 - '0') << 4;
			} else {
				value += ((ch1 - 'a') + 10) << 4;
			}

			if (ch2 >= '0' && ch2 <= '9') {
				value += ch2 - '0';
			} else {
				value += (ch2 - 'a') + 10;
			}

			if (sb.length() > 0) {
				sb.append('.');
			}

			sb.append(value);
		}

		return sb.toString();
	}

	public String getIpAddressInHex() {
		return m_ipAddressInHex;
	}

	public int getIpAddressValue() {
		String local = m_ipAddressInHex;
		int length = local.length();

		if (length > 8) {
			int index = m_ipAddressInHex.lastIndexOf(".");

			if (index < 0) {
				return getIpHexValue(local);
			} else {
				local = m_ipAddressInHex.substring(0, index);
				String pidStr = m_ipAddressInHex.substring(index + 1);

				if (StringUtils.isEmpty(pidStr)) {
					return getIpHexValue(local);
				}

				if (pidStr.length() > 5) {
					pidStr = pidStr.substring(0, 5);
				}
				int pid = Integer.parseInt(pidStr);

				return (pid << 17) ^ (getIpHexValue(local));
			}
		}

		return getIpHexValue(local);
	}

	private int getIpHexValue(String ipHex) {
		int ip = 0;
		int length = ipHex.length();

		for (int i = 0; i < length; i += 2) {
			char ch1 = ipHex.charAt(i);
			char ch2 = ipHex.charAt(i + 1);
			int value = 0;

			if (ch1 >= '0' && ch1 <= '9') {
				value += (ch1 - '0') << 4;
			} else {
				value += ((ch1 - 'a') + 10) << 4;
			}

			if (ch2 >= '0' && ch2 <= '9') {
				value += ch2 - '0';
			} else {
				value += (ch2 - 'a') + 10;
			}

			ip = (ip << 8) + value;
		}

		return ip;
	}

	public long getTimestamp() {
		return m_hour * 3600 * 1000L;
	}

	@Override
	public int hashCode() {
		int result = 1;

		result = 31 * result + ((m_domain == null) ? 0 : m_domain.hashCode());
		result = 31 * result + ((m_ipAddressInHex == null) ? 0 : m_ipAddressInHex.hashCode());
		result = 31 * result + m_hour;
		result = 31 * result + m_index;

		return result;
	}

	@Override
	public String toString() {
		StringBuilder sb = new StringBuilder(m_domain.length() + 30);

		sb.append(m_domain);
		sb.append('-');
		sb.append(m_ipAddressInHex);
		sb.append('-');
		sb.append(m_hour);
		sb.append('-');
		sb.append(m_index);

		return sb.toString();
	}

}