Java: introducing websocket support.

1 files changed, 136 insertions, 0 deletions

diff --git a/src/java/nginx/unit/websocket/pojo/PojoMessageHandlerWholeText.java b/src/java/nginx/unit/websocket/pojo/PojoMessageHandlerWholeText.java
new file mode 100644
index 00000000..59007349
--- /dev/null
+++ b/src/java/nginx/unit/websocket/pojo/PojoMessageHandlerWholeText.java
@@ -0,0 +1,136 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package nginx.unit.websocket.pojo;
+
+import java.io.IOException;
+import java.io.StringReader;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.websocket.DecodeException;
+import javax.websocket.Decoder;
+import javax.websocket.Decoder.Text;
+import javax.websocket.Decoder.TextStream;
+import javax.websocket.EndpointConfig;
+import javax.websocket.Session;
+
+import org.apache.tomcat.util.res.StringManager;
+import nginx.unit.websocket.Util;
+
+
+/**
+ * Text specific concrete implementation for handling whole messages.
+ */
+public class PojoMessageHandlerWholeText
+        extends PojoMessageHandlerWholeBase<String> {
+
+    private static final StringManager sm =
+            StringManager.getManager(PojoMessageHandlerWholeText.class);
+
+    private final List<Decoder> decoders = new ArrayList<>();
+    private final Class<?> primitiveType;
+
+    public PojoMessageHandlerWholeText(Object pojo, Method method,
+            Session session, EndpointConfig config,
+            List<Class<? extends Decoder>> decoderClazzes, Object[] params,
+            int indexPayload, boolean convert, int indexSession,
+            long maxMessageSize) {
+        super(pojo, method, session, params, indexPayload, convert,
+                indexSession, maxMessageSize);
+
+        // Update max text size handled by session
+        if (maxMessageSize > -1 && maxMessageSize > session.getMaxTextMessageBufferSize()) {
+            if (maxMessageSize > Integer.MAX_VALUE) {
+                throw new IllegalArgumentException(sm.getString(
+                        "pojoMessageHandlerWhole.maxBufferSize"));
+            }
+            session.setMaxTextMessageBufferSize((int) maxMessageSize);
+        }
+
+        // Check for primitives
+        Class<?> type = method.getParameterTypes()[indexPayload];
+        if (Util.isPrimitive(type)) {
+            primitiveType = type;
+            return;
+        } else {
+            primitiveType = null;
+        }
+
+        try {
+            if (decoderClazzes != null) {
+                for (Class<? extends Decoder> decoderClazz : decoderClazzes) {
+                    if (Text.class.isAssignableFrom(decoderClazz)) {
+                        Text<?> decoder = (Text<?>) decoderClazz.getConstructor().newInstance();
+                        decoder.init(config);
+                        decoders.add(decoder);
+                    } else if (TextStream.class.isAssignableFrom(
+                            decoderClazz)) {
+                        TextStream<?> decoder =
+                                (TextStream<?>) decoderClazz.getConstructor().newInstance();
+                        decoder.init(config);
+                        decoders.add(decoder);
+                    } else {
+                        // Binary decoder - ignore it
+                    }
+                }
+            }
+        } catch (ReflectiveOperationException e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+
+
+    @Override
+    protected Object decode(String message) throws DecodeException {
+        // Handle primitives
+        if (primitiveType != null) {
+            return Util.coerceToType(primitiveType, message);
+        }
+        // Handle full decoders
+        for (Decoder decoder : decoders) {
+            if (decoder instanceof Text) {
+                if (((Text<?>) decoder).willDecode(message)) {
+                    return ((Text<?>) decoder).decode(message);
+                }
+            } else {
+                StringReader r = new StringReader(message);
+                try {
+                    return ((TextStream<?>) decoder).decode(r);
+                } catch (IOException ioe) {
+                    throw new DecodeException(message, sm.getString(
+                            "pojoMessageHandlerWhole.decodeIoFail"), ioe);
+                }
+            }
+        }
+        return null;
+    }
+
+
+    @Override
+    protected Object convert(String message) {
+        return new StringReader(message);
+    }
+
+
+    @Override
+    protected void onClose() {
+        for (Decoder decoder : decoders) {
+            decoder.destroy();
+        }
+    }
+}