有办法用java获取通配符配置的子系统信息吗？

Question

 <subsystem xmlns="urn:jboss:domain:undertow:3.1">  
   <!-- ... -->  
    <servlet-container name="default" default-session-timeout="30">  
        <!-- ... -->  
    </servlet-container>  
    <!-- ... -->  
</subsystem>

我想在java程序中得到上述子系统的default-session-timeout值。如何做到这一点？我在网上搜索过，但没有发现任何有用的信息。

Answer 1

您将需要了解一下ModelControllerClient API。

像这样的东西会起作用的：

final ModelNode address = Operations.createAddress("subsystem", "undertow", "servlet-container", "default");
final ModelNode op = Operations.createReadAttributeOperation(address, "default-session-timeout");
try (ModelControllerClient client = ModelControllerClient.Factory.create("localhost", 9990)) {
    final ModelNode result = client.execute(op);
    if (!Operations.isSuccessfulOutcome(result)) {
        throw new RuntimeException(Operations.getFailureDescription(result).asString());
    }
    System.out.println(Operations.readResult(result).asInt());
}

如果您使用的是Maven，则依赖项将类似于：

​

<dependency>
    <groupId>org.wildfly.core</groupId>
    <artifactId>wildfly-controller-client</artifactId>
    <version>${version.org.wildfly.core}</version>
</dependency>