1st version of Java poll added

bindings/java/Context.cpp

@@ -24,29 +24,29 @@
 
 #include "org_zmq_Context.h"
 
+static void *fetch_socket (JNIEnv *env, jobject socket);
+
 /** Handle to Java's Context::contextHandle. */
 static jfieldID ctx_handle_fid = NULL;
 
 /**
  * Make sure we have a valid pointer to Java's Context::contextHandle.
  */
-static void ensure_context (JNIEnv *env,
-			    jobject obj)
+static void ensure_context (JNIEnv *env, jobject obj)
 {
     if (ctx_handle_fid == NULL) {
         jclass cls = env->GetObjectClass (obj);
-	assert (cls);
-	ctx_handle_fid = env->GetFieldID (cls, "contextHandle", "J");
-	assert (ctx_handle_fid);
-	env->DeleteLocalRef (cls);
+        assert (cls);
+        ctx_handle_fid = env->GetFieldID (cls, "contextHandle", "J");
+        assert (ctx_handle_fid);
+        env->DeleteLocalRef (cls);
     }
 }
 
 /**
  * Get the value of Java's Context::contextHandle.
  */
-static void *get_context (JNIEnv *env,
-			  jobject obj)
+static void *get_context (JNIEnv *env, jobject obj)
 {
     ensure_context (env, obj);
     void *s = (void*) env->GetLongField (obj, ctx_handle_fid);
@@ -56,9 +56,7 @@ static void *get_context (JNIEnv *env,
 /**
  * Set the value of Java's Context::contextHandle.
  */
-static void put_context (JNIEnv *env,
-			 jobject obj,
-			 void *s)
+static void put_context (JNIEnv *env, jobject obj, void *s)
 {
     ensure_context (env, obj);
     env->SetLongField (obj, ctx_handle_fid, (jlong) s);
@@ -67,8 +65,7 @@ static void put_context (JNIEnv *env,
 /**
  * Raise an exception that includes 0MQ's error message.
  */
-static void raise_exception (JNIEnv *env,
-			     int err)
+static void raise_exception (JNIEnv *env, int err)
 {
     //  Get exception class.
     jclass exception_class = env->FindClass ("java/lang/Exception");
@@ -88,18 +85,15 @@ static void raise_exception (JNIEnv *env,
  * Called to construct a Java Context object.
  */
 JNIEXPORT void JNICALL Java_org_zmq_Context_construct (JNIEnv *env,
-						       jobject obj,
-						       jint app_threads,
-						       jint io_threads,
-						       jint flags)
+    jobject obj, jint app_threads, jint io_threads, jint flags)
 {
     void *c = get_context (env, obj);
-    assert (! c);
+    assert (!c);
 
     c = zmq_init (app_threads, io_threads, flags);
-    put_context(env, obj, c);
+    put_context (env, obj, c);
 
-    if (c == NULL) {
+    if (!c) {
         raise_exception (env, errno);
         return;
     }
@@ -109,7 +103,7 @@ JNIEXPORT void JNICALL Java_org_zmq_Context_construct (JNIEnv *env,
  * Called to destroy a Java Context object.
  */
 JNIEXPORT void JNICALL Java_org_zmq_Context_finalize (JNIEnv *env,
-						      jobject obj)
+    jobject obj)
 {
     void *c = get_context (env, obj);
     assert (c);
@@ -118,3 +112,107 @@ JNIEXPORT void JNICALL Java_org_zmq_Context_finalize (JNIEnv *env,
     put_context (env, obj, NULL);
     assert (rc == 0);
 }
+
+JNIEXPORT jlong JNICALL Java_org_zmq_Context_poll (JNIEnv *env,
+    jobject obj,
+    jobjectArray socket_0mq,
+    jshortArray event_0mq,
+    jshortArray revent_0mq,
+    jlong timeout)
+{
+    jsize ls_0mq = 0;
+    jsize le_0mq = 0;
+    jsize lr_0mq = 0;
+
+    if (socket_0mq)
+        ls_0mq = env->GetArrayLength (socket_0mq);
+    if (event_0mq)
+        le_0mq = env->GetArrayLength (event_0mq);
+    if (revent_0mq)
+        lr_0mq = env->GetArrayLength (revent_0mq);
+
+    if (ls_0mq != le_0mq || ls_0mq != lr_0mq)
+        return 0;
+
+    jsize ls = ls_0mq;
+    if (ls <= 0)
+        return 0;
+
+    zmq_pollitem_t *pitem = new zmq_pollitem_t [ls];
+    short pc = 0;
+    int rc = 0;
+
+    //  Add 0MQ sockets.
+    if (ls_0mq > 0) {
+        jshort *e_0mq = env->GetShortArrayElements (event_0mq, 0);
+        if (e_0mq != NULL) {
+            for (int i = 0; i < ls_0mq; ++i) {
+                jobject s_0mq = env->GetObjectArrayElement (socket_0mq, i);
+                if (!s_0mq)
+                    continue;
+                void *s = fetch_socket (env, s_0mq);
+                if (!s)
+                    continue;
+                pitem [pc].socket = s;
+                pitem [pc].fd = 0;
+                pitem [pc].events = e_0mq [i];
+                pitem [pc].revents = 0;
+                ++pc;
+            }
+            env->ReleaseShortArrayElements(event_0mq, e_0mq, 0);
+        }
+    }
+
+    if (pc == ls) {
+        pc = 0;
+        long tout = (long) timeout;
+        rc = zmq_poll (pitem, ls, tout);
+        int err = 0;
+        const char *msg = "";
+        if (rc < 0) {
+            err = errno;
+            msg = zmq_strerror (err);
+        }
+    }
+
+    //  Set 0MQ results.
+    if (ls_0mq > 0) {
+        jshort *r_0mq = env->GetShortArrayElements (revent_0mq, 0);
+        if (r_0mq) {
+            for (int i = 0; i < ls_0mq; ++i) {
+                r_0mq [i] = pitem [pc].revents;
+                ++pc;
+            }
+            env->ReleaseShortArrayElements(revent_0mq, r_0mq, 0);
+        }
+    }
+
+    delete [] pitem;
+    return rc;
+}
+  
+/**
+ * Get the value of socketHandle for the specified Java Socket.
+ */
+static void *fetch_socket (JNIEnv *env, jobject socket)
+{
+    static jmethodID get_socket_handle_mid = NULL;
+
+    if (get_socket_handle_mid == NULL) {
+        jclass cls = env->GetObjectClass (socket);
+        assert (cls);
+        get_socket_handle_mid = env->GetMethodID (cls,
+            "getSocketHandle", "()J");
+        env->DeleteLocalRef (cls);
+        assert (get_socket_handle_mid);
+    }
+  
+    void *s = (void*) env->CallLongMethod (socket, get_socket_handle_mid);
+    if (env->ExceptionCheck ()) {
+        s = NULL;
+    }
+  
+    assert (s);
+    return s;
+}
+

bindings/java/Socket.cpp

@@ -32,23 +32,21 @@ static jfieldID socket_handle_fid = NULL;
 /**
  * Make sure we have a valid pointer to Java's Socket::socketHandle.
  */
-static void ensure_socket (JNIEnv *env,
-			   jobject obj)
+static void ensure_socket (JNIEnv *env, jobject obj)
 {
     if (socket_handle_fid == NULL) {
         jclass cls = env->GetObjectClass (obj);
-	assert (cls);
-	socket_handle_fid = env->GetFieldID (cls, "socketHandle", "J");
-	assert (socket_handle_fid);
-	env->DeleteLocalRef (cls);
+        assert (cls);
+        socket_handle_fid = env->GetFieldID (cls, "socketHandle", "J");
+        assert (socket_handle_fid);
+        env->DeleteLocalRef (cls);
     }
 }
 
 /**
  * Get the value of Java's Socket::socketHandle.
  */
-static void *get_socket (JNIEnv *env,
-			 jobject obj)
+static void *get_socket (JNIEnv *env, jobject obj)
 {
     ensure_socket (env, obj);
     void *s = (void*) env->GetLongField (obj, socket_handle_fid);
@@ -58,42 +56,35 @@ static void *get_socket (JNIEnv *env,
 /**
  * Set the value of Java's Socket::socketHandle.
  */
-static void put_socket (JNIEnv *env,
-			jobject obj,
-			void *s)
+static void put_socket (JNIEnv *env, jobject obj, void *s)
 {
     ensure_socket (env, obj);
     env->SetLongField (obj, socket_handle_fid, (jlong) s);
 }
 
 /**
- * Get the value of contextHandle for the Java Context associated with
- * this Java Socket object.
+ * Get the value of contextHandle for the specified Java Context.
  */
-static void *fetch_context (JNIEnv *env,
-			    jobject context)
+static void *fetch_context (JNIEnv *env, jobject context)
 {
     static jmethodID get_context_handle_mid = NULL;
 
-    if (get_context_handle_mid == NULL) {
+    if (!get_context_handle_mid) {
         jclass cls = env->GetObjectClass (context);
-	assert (cls);
-
-	get_context_handle_mid = env->GetMethodID (cls,
-						   "getContextHandle",
-						   "()J");
-	env->DeleteLocalRef (cls);
-	assert (get_context_handle_mid);
+        assert (cls);
+        get_context_handle_mid = env->GetMethodID (cls,
+            "getContextHandle", "()J");
+        env->DeleteLocalRef (cls);
+        assert (get_context_handle_mid);
     }
 
-    void *zmq_ctx = (void*) env->CallLongMethod (context,
-						 get_context_handle_mid);
+    void *c = (void*) env->CallLongMethod (context, get_context_handle_mid);
     if (env->ExceptionCheck ()) {
-        zmq_ctx = NULL;
+        c = NULL;
     }
 
-    assert (zmq_ctx);
-    return zmq_ctx;
+    assert (c);
+    return c;
 }
 
 /**
@@ -119,20 +110,18 @@ static void raise_exception (JNIEnv *env, int err)
  * Called to construct a Java Socket object.
  */
 JNIEXPORT void JNICALL Java_org_zmq_Socket_construct (JNIEnv *env,
-						      jobject obj,
-						      jobject context,
-						      jint type)
+    jobject obj, jobject context, jint type)
 {
     void *s = get_socket (env, obj);
     assert (! s);
 
-    void *zmq_ctx = fetch_context (env, context);
-    s = zmq_socket (zmq_ctx, type);
+    void *c = fetch_context (env, context);
+    s = zmq_socket (c, type);
     put_socket(env, obj, s);
 
     if (s == NULL) {
         raise_exception (env, errno);
-	return;
+        return;
     }
 }
 
@@ -140,7 +129,7 @@ JNIEXPORT void JNICALL Java_org_zmq_Socket_construct (JNIEnv *env,
  * Called to destroy a Java Socket object.
  */
 JNIEXPORT void JNICALL Java_org_zmq_Socket_finalize (JNIEnv *env,
-						     jobject obj)
+    jobject obj)
 {
     void *s = get_socket (env, obj);
     assert (s);
@@ -184,10 +173,7 @@ JNIEXPORT void JNICALL Java_org_zmq_Socket_setsockopt__IJ (JNIEnv *env,
  * Called by Java's Socket::setsockopt(int option, String optval).
  */
 JNIEXPORT void JNICALL Java_org_zmq_Socket_setsockopt__ILjava_lang_String_2 (
-    JNIEnv *env,
-    jobject obj,
-    jint option,
-    jstring optval)
+    JNIEnv *env, jobject obj, jint option, jstring optval)
 {
     switch (option) {
     case ZMQ_IDENTITY:
@@ -219,9 +205,8 @@ JNIEXPORT void JNICALL Java_org_zmq_Socket_setsockopt__ILjava_lang_String_2 (
 /**
  * Called by Java's Socket::bind(String addr).
  */
-JNIEXPORT void JNICALL Java_org_zmq_Socket_bind (JNIEnv *env,
-						 jobject obj,
-						 jstring addr)
+JNIEXPORT void JNICALL Java_org_zmq_Socket_bind (JNIEnv *env, jobject obj,
+    jstring addr)
 {
     void *s = get_socket (env, obj);
     assert (s);
@@ -248,8 +233,7 @@ JNIEXPORT void JNICALL Java_org_zmq_Socket_bind (JNIEnv *env,
  * Called by Java's Socket::connect(String addr).
  */
 JNIEXPORT void JNICALL Java_org_zmq_Socket_connect (JNIEnv *env,
-						    jobject obj,
-						    jstring addr)
+    jobject obj, jstring addr)
 {
     void *s = get_socket (env, obj);
     assert (s);
@@ -276,9 +260,7 @@ JNIEXPORT void JNICALL Java_org_zmq_Socket_connect (JNIEnv *env,
  * Called by Java's Socket::send(byte [] msg, long flags).
  */
 JNIEXPORT jboolean JNICALL Java_org_zmq_Socket_send (JNIEnv *env,
-						     jobject obj,
-						     jbyteArray msg,
-						     jlong flags)
+    jobject obj, jbyteArray msg, jlong flags)
 {
     void *s = get_socket (env, obj);
     assert (s);
@@ -316,8 +298,7 @@ JNIEXPORT jboolean JNICALL Java_org_zmq_Socket_send (JNIEnv *env,
 /**
  * Called by Java's Socket::flush().
  */
-JNIEXPORT void JNICALL Java_org_zmq_Socket_flush (JNIEnv *env,
-						  jobject obj)
+JNIEXPORT void JNICALL Java_org_zmq_Socket_flush (JNIEnv *env, jobject obj)
 {
     void *s = get_socket (env, obj);
     assert (s);
@@ -334,8 +315,7 @@ JNIEXPORT void JNICALL Java_org_zmq_Socket_flush (JNIEnv *env,
  * Called by Java's Socket::recv(long flags).
  */
 JNIEXPORT jbyteArray JNICALL Java_org_zmq_Socket_recv (JNIEnv *env,
-						       jobject obj,
-						       jlong flags)
+    jobject obj, jlong flags)
 {
     void *s = get_socket (env, obj);
     assert (s);
@@ -357,10 +337,9 @@ JNIEXPORT jbyteArray JNICALL Java_org_zmq_Socket_recv (JNIEnv *env,
 
     jbyteArray data = env->NewByteArray (zmq_msg_size (&message));
     assert (data);
-    env->SetByteArrayRegion (data,
-			     0,
-			     zmq_msg_size (&message),
-			     (jbyte*) zmq_msg_data (&message));
+    env->SetByteArrayRegion (data, 0, zmq_msg_size (&message),
+        (jbyte*) zmq_msg_data (&message));
 
     return data;
 }
+

bindings/java/org/zmq/Context.java

@@ -26,6 +26,10 @@ public class Context {
 
     public static final int POLL = 1;
 
+    public static final int POLLIN = 1;
+    public static final int POLLOUT = 2;
+    public static final int POLLERR = 4;
+
     /**
      * Class constructor.
      *
@@ -36,6 +40,20 @@ public class Context {
         construct (appThreads, ioThreads, flags);
     }
 
+    /**
+     * Issue a poll call on the specified 0MQ sockets.
+     * This function is experimental and may change in the future.
+     *
+     * @param socket an array of 0MQ Socket objects to poll.
+     * @param event an array of short values specifying what to poll for.
+     * @param revent an array of short values with the results.
+     * @param timeout the maximum timeout in microseconds.
+     */
+    public native long poll (Socket[] socket,
+			     short[] event,
+			     short[] revent,
+			     long timeout);
+
     /** Initialize the JNI interface */
     protected native void construct (int appThreads, int ioThreads, int flags);
 
@@ -50,10 +68,9 @@ public class Context {
      * @return the internal 0MQ context handle.
      */
     private long getContextHandle () {
-	return contextHandle;
+        return contextHandle;
     }
 
-
     /** Opaque data used by JNI driver. */
     private long contextHandle;
 }

bindings/java/org/zmq/Socket.java

@@ -50,7 +50,6 @@ public class Socket {
     public static final int SNDBUF = 11;
     public static final int RCVBUF = 12;
 
-
     /**
      * Class constructor.
      *
@@ -127,11 +126,9 @@ public class Socket {
      * @return the internal 0MQ socket handle.
      */
     private long getSocketHandle () {
-	return socketHandle;
+        return socketHandle;
     }
 
-
     /** Opaque data used by JNI driver. */
     private long socketHandle;
-
 }