Example usage for java.lang.reflect Proxy newProxyInstance

List of usage examples for java.lang.reflect Proxy newProxyInstance

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Introduction

In this page you can find the example usage for java.lang.reflect Proxy newProxyInstance.

Prototype

private static Object newProxyInstance(Class<?> caller, 
            Constructor<?> cons, InvocationHandler h)

Source Link

Usage

From source file:com.almende.eve.agent.AgentProxyFactory.java

/**
 * Gen proxy.//  w  ww  . j  a  v a 2  s .  co m
 * 
 * @param <T>
 *            the generic type
 * @param sender
 *            the sender
 * @param receiverUrl
 *            the receiver url
 * @param proxyInterface
 *            the interface this proxy implements
 * @return the t
 */
@SuppressWarnings("unchecked")
public static <T> T genProxy(final Agent sender, final URI receiverUrl, final Class<T> proxyInterface) {
    // http://docs.oracle.com/javase/1.4.2/docs/guide/reflection/proxy.html
    final T proxy = (T) Proxy.newProxyInstance(proxyInterface.getClassLoader(), new Class[] { proxyInterface },
            new InvocationHandler() {

                private Map<Method, Boolean> cache = new HashMap<Method, Boolean>();

                @Override
                public Object invoke(final Object proxy, final Method method, final Object[] args) {
                    boolean doSync = true;
                    if (cache.containsKey(method)) {
                        doSync = cache.get(method);
                    } else {
                        AnnotatedClass clazz = AnnotationUtil.get(proxyInterface);
                        if (clazz != null) {
                            List<AnnotatedMethod> list = clazz.getMethods(method.getName());
                            for (AnnotatedMethod m : list) {
                                if (m.getAnnotation(NoReply.class) != null) {
                                    doSync = false;
                                }
                            }
                            if (doSync && method.getReturnType().equals(void.class)
                                    && clazz.getAnnotation(NoReply.class) != null) {
                                doSync = false;
                            }
                        }
                        cache.put(method, doSync);
                    }
                    SyncCallback<JsonNode> callback = null;
                    if (doSync) {
                        callback = new SyncCallback<JsonNode>() {
                        };
                    }
                    try {
                        sender.call(receiverUrl, method, args, callback);
                    } catch (final IOException e) {
                        throw new JSONRPCException(CODE.REMOTE_EXCEPTION, e.getLocalizedMessage(), e);
                    }
                    if (callback != null) {
                        try {
                            return TypeUtil.inject(callback.get(), method.getGenericReturnType());
                        } catch (final Exception e) {
                            throw new JSONRPCException(CODE.REMOTE_EXCEPTION, e.getLocalizedMessage(), e);
                        }
                    }
                    return null;
                }
            });
    return proxy;
}

From source file:org.apache.nifi.authorization.AccessPolicyProviderFactory.java

public static AccessPolicyProvider withNarLoader(final AccessPolicyProvider baseAccessPolicyProvider,
        final ClassLoader classLoader) {
    final AccessPolicyProviderInvocationHandler invocationHandler = new AccessPolicyProviderInvocationHandler(
            baseAccessPolicyProvider, classLoader);

    // extract all interfaces... baseAccessPolicyProvider is non null so getAllInterfaces is non null
    final List<Class<?>> interfaceList = ClassUtils.getAllInterfaces(baseAccessPolicyProvider.getClass());
    final Class<?>[] interfaces = interfaceList.toArray(new Class<?>[interfaceList.size()]);

    return (AccessPolicyProvider) Proxy.newProxyInstance(classLoader, interfaces, invocationHandler);
}

From source file:com.amazonaws.http.conn.ClientConnectionRequestFactory.java

/**
 * Returns a wrapped instance of {@link ClientConnectionRequest}
 * to capture the necessary performance metrics.
 * @param orig the target instance to be wrapped
 *//*ww  w .j  a  v a2  s. co  m*/
static ClientConnectionRequest wrap(ClientConnectionRequest orig) {
    if (orig instanceof Wrapped)
        throw new IllegalArgumentException();
    return (ClientConnectionRequest) Proxy.newProxyInstance(
            // https://github.com/aws/aws-sdk-java/pull/48#issuecomment-29454423
            ClientConnectionRequestFactory.class.getClassLoader(), interfaces, new Handler(orig));
}

From source file:org.eclipse.ecr.core.storage.sql.net.MapperClient.java

public static Mapper getMapper(RepositoryImpl repository, Credentials credentials) throws StorageException {
    MapperClient handler = new MapperClient(repository, credentials);
    Mapper mapper = (Mapper) Proxy.newProxyInstance(MapperClient.class.getClassLoader(),
            new Class<?>[] { Mapper.class }, handler);
    synchronized (repository) {
        handler.repositoryId = repository.repositoryId;
        Identification id = mapper.getIdentification();
        handler.identification = id;//  w  w  w.ja v  a  2s.co m
        repository.repositoryId = id.repositoryId;
    }
    return mapper;
}

From source file:io.lavagna.common.QueryFactory.java

@SuppressWarnings("unchecked")
private static <T> T from(final Class<T> clazz, final String activeDb, final NamedParameterJdbcTemplate jdbc) {
    return (T) Proxy.newProxyInstance(clazz.getClassLoader(), new Class[] { clazz }, new InvocationHandler() {
        @Override//from  w  w w . java 2s  .  com
        public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
            QueryTypeAndQuery qs = extractQueryAnnotation(clazz, activeDb, method);
            return qs.type.apply(qs.query, jdbc, method, args);
        }
    });
}

From source file:org.apache.hadoop.hbase.thrift.HbaseHandlerMetricsProxy.java

public static Hbase.Iface newInstance(Hbase.Iface handler, ThriftMetrics metrics, Configuration conf) {
    return (Hbase.Iface) Proxy.newProxyInstance(handler.getClass().getClassLoader(),
            new Class[] { Hbase.Iface.class }, new HbaseHandlerMetricsProxy(handler, metrics, conf));
}

From source file:org.cloudata.core.common.testhelper.FaultInjectionProxy.java

@SuppressWarnings("unchecked")
public static <T> T wrap(Object body, Class<? extends T> c) {
    synchronized (fmLock) {
        if (fm == null) {
            try {
                fm = FaultManager.create(new CloudataConf());
            } catch (IOException e) {
                LOG.warn("Fail to create fault manager", e);
            }/*from   www. j ava  2  s  . c  o m*/
        }
    }
    return (T) Proxy.newProxyInstance(c.getClassLoader(), new Class<?>[] { c },
            new FaultInjectionHandler(body));
}

From source file:com.amazonaws.http.conn.ClientConnectionManagerFactory.java

/**
 * Returns a wrapped instance of {@link ClientConnectionManager}
 * to capture the necessary performance metrics.
 * @param orig the target instance to be wrapped
 */// w w w. j  av a  2s .co  m
public static ClientConnectionManager wrap(ClientConnectionManager orig) {
    if (orig instanceof Wrapped)
        throw new IllegalArgumentException();
    final Class<?>[] interfaces;
    if (orig instanceof ConnPoolControl) {
        interfaces = new Class<?>[] { ClientConnectionManager.class, ConnPoolControl.class, Wrapped.class };
    } else {
        interfaces = new Class<?>[] { ClientConnectionManager.class, Wrapped.class };
    }
    return (ClientConnectionManager) Proxy.newProxyInstance(
            // https://github.com/aws/aws-sdk-java/pull/48#issuecomment-29454423
            ClientConnectionManagerFactory.class.getClassLoader(), interfaces, new Handler(orig));
}

From source file:com.ksc.http.conn.ClientConnectionManagerFactory.java

/**
 * Returns a wrapped instance of {@link HttpClientConnectionManager}
 * to capture the necessary performance metrics.
 *
 * @param orig the target instance to be wrapped
 *//*from  w ww . ja  va2  s  . co m*/
public static HttpClientConnectionManager wrap(HttpClientConnectionManager orig) {
    if (orig instanceof Wrapped)
        throw new IllegalArgumentException();
    final Class<?>[] interfaces;
    if (orig instanceof ConnPoolControl) {
        interfaces = new Class<?>[] { HttpClientConnectionManager.class, ConnPoolControl.class, Wrapped.class };
    } else {
        interfaces = new Class<?>[] { HttpClientConnectionManager.class, Wrapped.class };
    }
    return (HttpClientConnectionManager) Proxy.newProxyInstance(
            // https://github.com/aws/aws-sdk-java/pull/48#issuecomment-29454423
            ClientConnectionManagerFactory.class.getClassLoader(), interfaces, new Handler(orig));
}

From source file:com.baidu.api.client.core.JsonProxy.java

/**
 * Create the proxy instance of api client stub. Proxied by JsonProxy.
 *
 * @param <T>        The proxy instannce type.
 * @param interfaces The proxy instannce type class.
 * @param service    The original object.
 * @return The proxied object./* ww  w.j  a v a2s.  co m*/
 */
@SuppressWarnings("unchecked")
public static <T> T createProxy(Class<T> interfaces, VersionService service) {
    JsonProxy<T> proxy = new JsonProxy<T>(interfaces, service);
    return (T) Proxy.newProxyInstance(JsonProxy.class.getClassLoader(), new Class<?>[] { interfaces }, proxy);
}