/*
 * Copyright 1999-2011 Alibaba Group.
 *  
 * 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.
 */
package com.alibaba.dubbo.common;

import java.util.regex.Pattern;

/**
 * Constants
 * 
 * @author william.liangf
 */
public class Constants {

    public static final String  PROVIDER                           = "provider";

    public static final String  CONSUMER                           = "consumer";

    public static final String  PROVIDERS                          = "providers";

    public static final String  CONSUMERS                          = "consumers";

    public static final String  REGISTER                           = "register";

    public static final String  UNREGISTER                         = "unregister";

    public static final String  SUBSCRIBE                          = "subscribe";

    public static final String  UNSUBSCRIBE                        = "unsubscribe";

    public static final String  VALIDATION_KEY                     = "validation";

    public static final String  CACHE_KEY                          = "cache";

    public static final String  DUBBO_PROPERTIES_KEY               = "dubbo.properties.file";

    public static final String  DEFAULT_DUBBO_PROPERTIES           = "dubbo.properties";

    public static final String  SENT_KEY                           = "sent";

    public static final boolean DEFAULT_SENT                       = false;

    public static final String  REGISTRY_PROTOCOL                  = "registry";

    public static final String  $INVOKE                            = "$invoke";

    public static final String  $ECHO                              = "$echo";

    public static final int     DEFAULT_IO_THREADS                 = Runtime.getRuntime()
                                                                           .availableProcessors() + 1;

    public static final String  DEFAULT_PROXY                      = "javassist";

    public static final int     DEFAULT_PAYLOAD                    = 8 * 1024 * 1024;                      // 8M

    public static final String  DEFAULT_CLUSTER                    = "failover";

    public static final String  DEFAULT_DIRECTORY                  = "dubbo";

    public static final String  DEFAULT_LOADBALANCE                = "random";

    public static final String  DEFAULT_PROTOCOL                   = "dubbo";

    public static final String  DEFAULT_EXCHANGER                  = "header";

    public static final String  DEFAULT_TRANSPORTER                = "netty";

    public static final String  DEFAULT_REMOTING_SERVER            = "netty";

    public static final String  DEFAULT_REMOTING_CLIENT            = "netty";

    public static final String  DEFAULT_REMOTING_CODEC             = "dubbo";

    public static final String  DEFAULT_REMOTING_SERIALIZATION     = "hessian2";

    public static final String  DEFAULT_HTTP_SERVER                = "servlet";

    public static final String  DEFAULT_HTTP_CLIENT                = "jdk";

    public static final String  DEFAULT_HTTP_SERIALIZATION         = "json";

    public static final String  DEFAULT_CHARSET                    = "UTF-8";

    public static final int     DEFAULT_WEIGHT                     = 100;

    public static final int     DEFAULT_FORKS                      = 2;

    public static final String  DEFAULT_THREAD_NAME                = "Dubbo";

    public static final int     DEFAULT_THREADS                    = 200;

    public static final int     DEFAULT_QUEUES                     = 0;

    public static final int     DEFAULT_THREAD_ALIVE               = 60 * 1000;

    public static final int     DEFAULT_CONNECTIONS                = 0;

    public static final int     DEFAULT_ACCEPTS                    = 0;

    public static final int     DEFAULT_IDLE_TIMEOUT               = 600 * 1000;

    public static final int     DEFAULT_HEARTBEAT                  = 0;

    public static final int     DEFAULT_TIMEOUT                    = 5000;

    public static final int     DEFAULT_RETRIES                    = 2;

    // default buffer size is 8k.
    public static final int     DEFAULT_BUFFER_SIZE                = 8 * 1024;

    public static final int     MAX_BUFFER_SIZE                    = 16 * 1024;

    public static final int     MIN_BUFFER_SIZE                    = 1 * 1024;

    public static final String  REMOVE_VALUE_PREFIX                = "-";

    public static final String  HIDE_KEY_PREFIX                    = ".";

    public static final String  DEFAULT_KEY_PREFIX                 = "default.";

    public static final String  DEFAULT_KEY                        = "default";

    public static final String  LOADBALANCE_KEY                    = "loadbalance";

    // key for router type, for e.g., "script"/"file",  corresponding to ScriptRouterFactory.NAME, FileRouterFactory.NAME 
    public static final String  ROUTER_KEY                         = "router";

    public static final String  CLUSTER_KEY                        = "cluster";

    public static final String  REGISTRY_KEY                       = "registry";

    public static final String  MONITOR_KEY                        = "monitor";

    public static final String  DEFAULT_REGISTRY                   = "dubbo";

    public static final String  BACKUP_KEY                         = "backup";

    public static final String  DIRECTORY_KEY                      = "directory";

    public static final String  DEPRECATED_KEY                     = "deprecated";

    public static final String  ANYHOST_KEY                        = "anyhost";

    public static final String  ANYHOST                            = "0.0.0.0";

    public static final String  APPLICATION_KEY                    = "application";

    public static final String  LOCAL_KEY                          = "local";

    public static final String  STUB_KEY                           = "stub";

    public static final String  MOCK_KEY                           = "mock";

    public static final String  PROTOCOL_KEY                       = "protocol";

    public static final String  PROXY_KEY                          = "proxy";

    public static final String  WEIGHT_KEY                         = "weight";

    public static final String  FORKS_KEY                          = "forks";

    public static final String  DEFAULT_THREADPOOL                 = "fixed";

    public static final String  DEFAULT_CLIENT_THREADPOOL          = "cached";

    public static final String  THREADPOOL_KEY                     = "threadpool";

    public static final String  THREAD_NAME_KEY                    = "threadname";

    public static final String  IO_THREADS_KEY                     = "iothreads";

    public static final String  THREADS_KEY                        = "threads";

    public static final String  QUEUES_KEY                         = "queues";

    public static final String  THREAD_ALIVE_KEY                   = "threadalive";

    public static final String  EXECUTES_KEY                       = "executes";

    public static final String  BUFFER_KEY                         = "buffer";

    public static final String  PAYLOAD_KEY                        = "payload";

    public static final String  REFERENCE_FILTER_KEY               = "reference.filter";

    public static final String  INVOKER_LISTENER_KEY               = "invoker.listener";

    public static final String  SERVICE_FILTER_KEY                 = "service.filter";

    public static final String  EXPORTER_LISTENER_KEY              = "exporter.listener";

    public static final String  ACCESS_LOG_KEY                     = "accesslog";

    public static final String  ACTIVES_KEY                        = "actives";

    public static final String  CONNECTIONS_KEY                    = "connections";

    public static final String  ACCEPTS_KEY                        = "accepts";

    public static final String  IDLE_TIMEOUT_KEY                   = "idle.timeout";

    public static final String  HEARTBEAT_KEY                      = "heartbeat";

    public static final String  HEARTBEAT_TIMEOUT_KEY              = "heartbeat.timeout";

    public static final String  CONNECT_TIMEOUT_KEY                = "connect.timeout";

    public static final String  TIMEOUT_KEY                        = "timeout";

    public static final String  RETRIES_KEY                        = "retries";

    public static final String  PROMPT_KEY                         = "prompt";

    public static final String  DEFAULT_PROMPT                     = "dubbo>";

    public static final String  CODEC_KEY                          = "codec";
    public static final String  DOWNSTREAM_CODEC_KEY               = "codec.downstream";

    public static final String  SERIALIZATION_KEY                  = "serialization";

    public static final String  EXCHANGER_KEY                      = "exchanger";

    public static final String  TRANSPORTER_KEY                    = "transporter";

    public static final String  SERVER_KEY                         = "server";

    public static final String  CLIENT_KEY                         = "client";

    public static final String  ASYNC_KEY                          = "async";

    public static final String  TOKEN_KEY                          = "token";

    public static final String  METHODS_KEY                        = "methods";

    public static final String  CHARSET_KEY                        = "charset";

    public static final String  RECONNECT_KEY                      = "reconnect";

    public static final String  SEND_RECONNECT_KEY                 = "send.reconnect";

    public static final int     DEFAULT_RECONNECT_PERIOD           = 2000;

    public static final String  SHUTDOWN_TIMEOUT_KEY               = "shutdown.timeout";

    public static final int     DEFAULT_SHUTDOWN_TIMEOUT           = 1000 * 60 * 5;

    public static final String  TIMESTAMP_KEY                      = "timestamp";

    public static final String  CHECK_KEY                          = "check";

    public static final String  REGISTER_KEY                       = "register";

    public static final String  GROUP_KEY                          = "group";

    public static final String  PATH_KEY                           = "path";

    public static final String  INTERFACE_KEY                      = "interface";

    public static final String  GENERIC_KEY                        = "generic";

    public static final String  FILE_KEY                           = "file";

    public static final String  WAIT_KEY                           = "wait";

    public static final String  ADMIN_KEY                          = "admin";

    public static final String  VERSION_KEY                        = "version";

    public static final String  REVISION_KEY                       = "revision";

    public static final String  DUBBO_VERSION_KEY                  = "dubbo";

    public static final String  HESSIAN_VERSION_KEY                = "hessian.version";

    public static final String  DISPATHER_KEY                      = "dispather";

    public static final String  CHANNEL_HANDLER_KEY                = "channel.handler";

    public static final String  DEFAULT_CHANNEL_HANDLER            = "default";

    public static final String  ANY_VALUE                          = "*";

    public static final String  COMMA_SEPARATOR                    = ",";

    public static final Pattern COMMA_SPLIT_PATTERN                = Pattern
                                                                           .compile("\\s*[,]+\\s*");

    public final static String  PATH_SEPARATOR                     = "/";

    public static final String  REGISTRY_SEPARATOR                 = "|";

    public static final Pattern REGISTRY_SPLIT_PATTERN             = Pattern
                                                                           .compile("\\s*[|]+\\s*");

    public static final String  SEMICOLON_SEPARATOR                = ";";

    public static final Pattern SEMICOLON_SPLIT_PATTERN            = Pattern
                                                                           .compile("\\s*[;]+\\s*");

    public static final String  CONNECT_QUEUE_CAPACITY             = "connect.queue.capacity";

    public static final String  CONNECT_QUEUE_WARNING_SIZE         = "connect.queue.warning.size";

    public static final int     DEFAULT_CONNECT_QUEUE_WARNING_SIZE = 1000;

    public static final String  CHANNEL_ATTRIBUTE_READONLY_KEY     = "channel.readonly";

    public static final String  CHANNEL_READONLYEVENT_SENT_KEY     = "channel.readonly.sent";

    public static final String  CHANNEL_SEND_READONLYEVENT_KEY     = "channel.readonly.send";

    public static final String  SUBSCRIBE_PROTOCOL                 = "subscribe";

    public static final String  EMPTY_PROTOCOL                     = "empty";

    public static final String  ROUTE_PROTOCOL                     = "route";

    public static final String  MOCK_PROTOCOL                      = "mock";

    public static final String  RETURN_PREFIX                      = "return ";
    public static final String  THROW_PREFIX                       = "throw";

    public static final String  FAIL_PREFIX                        = "fail:";

    public static final String  FORCE_PREFIX                       = "force:";

    public static final String  MERGER_KEY                         = "merger";

    public static final String  TPS_MAX_KEY                        = "tps.max";

    /**
     * 集群时是否排除非available的invoker
     */
    public static final String  CLUSTER_AVAILABLE_CHECK_KEY        = "cluster.availablecheck";

    /**
     */
    public static final boolean DEFAULT_CLUSTER_AVAILABLE_CHECK    = true;

    /**
     * 集群时是否启用sticky策略
     */
    public static final String  CLUSTER_STICKY_KEY                 = "sticky";

    /**
     * sticky默认值.
     */
    public static final boolean DEFAULT_CLUSTER_STICKY             = false;

    /**
     * 创建client时，是否先要建立连接。
     */
    public static final String  LAZY_CONNECT_KEY                   = "lazy";

    /**
     * lazy连接的初始状态是连接状态还是非连接状态？
     */
    public static final String  LAZY_CONNECT_INITIAL_STATE_KEY     = "connect.lazy.initial.state";

    /**
     * lazy连接的初始状态默认是连接状态.
     */
    public static final boolean DEFAULT_LAZY_CONNECT_INITIAL_STATE = true;

    /**
     * 注册中心是否同步存储文件，默认异步
     */
    public static final String  REGISTRY_FILESAVE_SYNC_KEY         = "save.file";

    /**
     * 注册中心失败事件重试事件
     */
    public static final String  REGISTRY_RETRY_PERIOD_KEY          = "retry.period";

    /**
     * 重试周期
     */
    public static final int DEFAULT_REGISTRY_RETRY_PERIOD          =  5 * 1000;
    
    /**
     * 注册中心自动重连时间
     */
    public static final String  REGISTRY_RECONNECT_PERIOD_KEY      = "reconnect.period";

    public static final int     DEFAULT_REGISTRY_RECONNECT_PERIOD  = 3 * 1000;
    
    public static final String  SESSION_TIMEOUT_KEY                = "session";

    public static final int     DEFAULT_SESSION_TIMEOUT            = 60 * 1000;

    /**
     * 注册中心导出URL参数的KEY
     */
    public static final String  EXPORT_KEY                         = "export";

    /**
     * 注册中心引用URL参数的KEY
     */
    public static final String  REFER_KEY                          = "refer";

    /**
     * callback inst id
     */
    public static final String  CALLBACK_SERVICE_KEY               = "callback.service.instid";

    /**
     * 每个客户端同一个接口 callback服务实例的限制
     */
    public static final String  CALLBACK_INSTANCES_LIMIT_KEY       = "callbacks";

    /**
     * 每个客户端同一个接口 callback服务实例的限制
     */
    public static final int     DEFAULT_CALLBACK_INSTANCES         = 1;

    public static final String  CALLBACK_SERVICE_PROXY_KEY         = "callback.service.proxy";

    public static final String  IS_CALLBACK_SERVICE                = "is_callback_service";

    /**
     * channel中callback的invokers
     */
    public static final String  CHANNEL_CALLBACK_KEY               = "channel.callback.invokers.key";

    @Deprecated
    public static final String  SHUTDOWN_WAIT_SECONDS_KEY          = "dubbo.service.shutdown.wait.seconds";

    public static final String  SHUTDOWN_WAIT_KEY                  = "dubbo.service.shutdown.wait";

    public static final String  IS_SERVER_KEY                      = "isserver";

    /**
     * 默认值毫秒，避免重新计算.
     */
    public static final int     DEFAULT_SERVER_SHUTDOWN_TIMEOUT    = 10000;

    public static final String  ON_CONNECT_KEY                     = "onconnect";

    public static final String  ON_DISCONNECT_KEY                  = "ondisconnect";

    public static final String  RETURN_KEY                         = "return";

    public static final String  ON_INVOKE_METHOD_KEY               = "oninvoke.method";

    public static final String  ON_RETURN_METHOD_KEY               = "onreturn.method";

    public static final String  ON_THROW_METHOD_KEY                = "onthrow.method";

    public static final String  ON_INVOKE_INSTANCE_KEY             = "oninvoke.instance";

    public static final String  ON_RETURN_INSTANCE_KEY             = "onreturn.instance";

    public static final String  ON_THROW_INSTANCE_KEY              = "onthrow.instance";

    public static final String  OVERRIDE_PROTOCOL                  = "override";

    public static final String  RULE_KEY                           = "rule";

    public static final String  TYPE_KEY                           = "type";

    // when ROUTER_KEY's value is set to ROUTER_TYPE_CLEAR, RegistryDirectory will clean all current routers
    public static final String  ROUTER_TYPE_CLEAR                  = "clean";

    public static final String  DEFAULT_SCRIPT_TYPE_KEY            = "javascript";

    public static final String  STUB_EVENT_KEY                     = "dubbo.stub.event";

    public static final boolean DEFAULT_STUB_EVENT                 = false;

    public static final String  STUB_EVENT_METHODS_KEY             = "dubbo.stub.event.methods";

    //invocation attachment属性中如果有此值，则选择mock invoker
    public static final String  INVOCATION_NEED_MOCK               = "invocation.need.mock";

    /*
     * private Constants(){ }
     */

}