Example usage for javax.management Query isInstanceOf

Introduction

In this page you can find the example usage for javax.management Query isInstanceOf.

Prototype

public static QueryExp isInstanceOf(StringValueExp classNameValue) 

Source Link

Document

Returns a query expression that represents an inheritance constraint on an MBean class.

Usage

From source file:org.onehippo.forge.camel.util.CamelContextUtils.java

/**
 * Finds the {@code ManagedCamelContextMBean} having {@code camelContextId} from the platform MBean server and invokes the {@code operation}
 * with {@code params} of which signature is like {@code signature} on the found {@code ManagedCamelContext} MBean.
 * If a blank {@code camelContextId} provided, then it invokes the operation on the first found {@code ManagedCamelContextMBean} MBean.
 * <p>Example code:</p>//from  ww  w . j av a2 s.  c om
 * <pre>
 * CamelContextUtils.invokeManagedCamelContextMBean("camel-1", "sendBody", new Object [] { "direct:test", body }, new String {} { String.class.getName(), Object.class.getName() });;
 * </pre>
 * @param camelContextId camel context ID
 * @param operation operation name
 * @param params parameters array
 * @param signature signature of parameters
 * @return operation return
 */
public static Object invokeManagedCamelContextMBean(final String camelContextId, final String operation,
        Object[] params, String[] signature) {
    Object ret = null;

    try {
        QueryExp expr = Query.isInstanceOf(new StringValueExp(CAMEL_CONTEXT_MBEAN_INSTANCE_TYPE));
        MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer();

        ObjectName objectName;
        if (StringUtils.isNotBlank(camelContextId)) {
            objectName = new ObjectName("org.apache.camel:name=" + camelContextId);
        } else {
            objectName = new ObjectName("org.apache.camel:*");
        }

        Set<ObjectName> objectNames = mbeanServer.queryNames(objectName, expr);

        if (!objectNames.isEmpty()) {
            final ObjectName firstObjectName = objectNames.iterator().next();
            ret = mbeanServer.invoke(firstObjectName, operation, params, signature);
        } else {
            throw new RuntimeException("No CamelContext found by name: " + objectName);
        }
    } catch (MalformedObjectNameException e) {
        throw new RuntimeException("MalformedObjectNameException: " + e, e);
    } catch (InstanceNotFoundException e) {
        throw new RuntimeException("InstanceNotFoundException: " + e, e);
    } catch (ReflectionException e) {
        throw new RuntimeException("ReflectionException: " + e, e);
    } catch (MBeanException e) {
        throw new RuntimeException("MBeanException: " + e, e);
    }

    return ret;
}

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