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package org.kuali.rice.ksb.messaging; |
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import org.apache.commons.lang.StringUtils; |
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import org.apache.log4j.Logger; |
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import org.kuali.rice.core.api.resourceloader.GlobalResourceLoader; |
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import javax.xml.namespace.QName; |
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import java.lang.reflect.InvocationHandler; |
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import java.lang.reflect.Method; |
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import java.lang.reflect.Proxy; |
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public class KSBClientProxy implements InvocationHandler { |
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37 | 0 | private static final Logger LOG = Logger.getLogger(KSBClientProxy.class); |
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private QName serviceName; |
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private volatile Object service; |
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public static <T> T newInstance(String serviceQName, Class<T> interfaceClass) throws InstantiationException, IllegalAccessException { |
44 | 0 | if (StringUtils.isBlank(serviceQName)) { |
45 | 0 | throw new IllegalArgumentException("the qname was blank"); |
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} |
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48 | 0 | if (interfaceClass == null) { |
49 | 0 | throw new IllegalArgumentException("the interfaceClass was null"); |
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} |
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@SuppressWarnings("unchecked") |
53 | 0 | final T t = (T)Proxy.newProxyInstance(interfaceClass.getClassLoader(), new Class[] { interfaceClass }, new KSBClientProxy(serviceQName)); |
54 | 0 | return t; |
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} |
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57 | 0 | public KSBClientProxy(String serviceQName){ |
58 | 0 | if (StringUtils.isBlank(serviceQName)) { |
59 | 0 | throw new IllegalArgumentException("the qname was blank"); |
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} |
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62 | 0 | this.serviceName = QName.valueOf(serviceQName); |
63 | 0 | } |
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public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { |
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68 | 0 | Object s = service; |
69 | 0 | if (s == null) { |
70 | 0 | synchronized (this) { |
71 | 0 | s = service; |
72 | 0 | if (s == null) { |
73 | 0 | service = s = GlobalResourceLoader.getService(serviceName); |
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} |
75 | 0 | } |
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} |
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78 | 0 | if (s != null) { |
79 | 0 | return method.invoke(s, args); |
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} |
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82 | 0 | LOG.warn("serviceName: " + serviceName + " was not found"); |
83 | 0 | return null; |
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} |
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} |