1 files changed, 89 insertions, 0 deletions
diff --git a/framework/src/onos/utils/nio/src/test/java/org/onlab/nio/TestMessageStream.java b/framework/src/onos/utils/nio/src/test/java/org/onlab/nio/TestMessageStream.java
new file mode 100644
index 00000000..fc86beb9
--- /dev/null
+++ b/framework/src/onos/utils/nio/src/test/java/org/onlab/nio/TestMessageStream.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * Licensed 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 org.onlab.nio;
+
+import java.nio.ByteBuffer;
+import java.nio.channels.ByteChannel;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkState;
+
+/**
+ * Fixed-length message transfer buffer.
+ */
+public class TestMessageStream extends MessageStream<TestMessage> {
+
+    private static final String E_WRONG_LEN = "Illegal message length: ";
+    private static final long START_TAG = 0xfeedcafedeaddeedL;
+    private static final long END_TAG = 0xbeadcafedeaddeedL;
+    private static final int META_LENGTH = 40;
+
+    private final int length;
+    private boolean isStrict = true;
+
+    public TestMessageStream(int length, ByteChannel ch, IOLoop<TestMessage, ?> loop) {
+        super(loop, ch, 64 * 1024, 500);
+        checkArgument(length >= META_LENGTH, "Length must be greater than header length of 40");
+        this.length = length;
+    }
+
+    void setNonStrict() {
+        isStrict = false;
+    }
+
+    @Override
+    protected TestMessage read(ByteBuffer rb) {
+        if (rb.remaining() < length) {
+            return null;
+        }
+
+        long startTag = rb.getLong();
+        if (isStrict) {
+            checkState(startTag == START_TAG, "Incorrect message start");
+        }
+
+        long size = rb.getLong();
+        long requestorTime = rb.getLong();
+        long responderTime = rb.getLong();
+        byte[] padding = padding();
+        rb.get(padding);
+
+        long endTag = rb.getLong();
+        if (isStrict) {
+            checkState(endTag == END_TAG, "Incorrect message end");
+        }
+
+        return new TestMessage((int) size, requestorTime, responderTime, padding);
+    }
+
+    @Override
+    protected void write(TestMessage message, ByteBuffer wb) {
+        if (message.length() != length) {
+            throw new IllegalArgumentException(E_WRONG_LEN + message.length());
+        }
+
+        wb.putLong(START_TAG);
+        wb.putLong(message.length());
+        wb.putLong(message.requestorTime());
+        wb.putLong(message.responderTime());
+        wb.put(message.padding(), 0, length - META_LENGTH);
+        wb.putLong(END_TAG);
+    }
+
+    public byte[] padding() {
+        return new byte[length - META_LENGTH];
+    }
+}