ActiveMQ内存配置和密码设置

1.配置内存　　

　　bin中activemq.bat 中的第一行 加上 :

　　REM 配置内存
　　set ACTIVEMQ_OPTS=-Xms1G -Xmx1G

2.修改控制台密码

1.打开conf/jetty.xml，

<bean id="securityConstraint" class="org.eclipse.jetty.http.security.Constraint">
    <property name="name" value="BASIC" />
    <property name="roles" value="admin" />
    <property name="authenticate" value="false" />
</bean>

将property name为authenticate的属性value="false" 改为"true"，高版本的已经默认为true了。

2.控制台的登录用户名密码保存在conf/jetty-realm.properties文件中，内容如下:

# Defines users that can access the web (console, demo, etc.)
# username: password [,rolename ...]
admin: admin, admin

值得注意的是 用户名和密码的格式是：用户名 : 密码 ,角色名

3.修改客户端连接密码

1.修改activemq.xml配置,需要新增一个插件,在<broker>节点里面<systemUsage>节点前面添加如下

<plugins>
   <simpleAuthenticationPlugin>
         <users>
              <authenticationUser username="${activemq.username}" password="${activemq.password}" groups="users,admins"/>
         </users>
   </simpleAuthenticationPlugin>
</plugins> 

或者直接修改为（即直接将username和password赋值，所赋的值即为用户名和密码。如果使用这一种方式的话，下面的第二步则不需要了）：

<plugins>
   <simpleAuthenticationPlugin>
         <users>
              <authenticationUser username="testUserName" password="testPassword" groups="users,admins"/>
         </users>
   </simpleAuthenticationPlugin>
</plugins> 

2.用户名密码文件为:credentials.properties

## ---------------------------------------------------------------------------
## 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.
## --------------------------------------------------------------------------- 

# Defines credentials that will be used by components (like web console) to access the broker 

activemq.username=system    # 用户名
activemq.password=manager   # 密码
guest.password=password