| /** |
| * 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 org.apache.hadoop.hbase.ipc; |
| |
| import static org.junit.Assert.*; |
| |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.nio.channels.FileChannel; |
| import org.apache.hadoop.hbase.HBaseClassTestRule; |
| import org.apache.hadoop.hbase.testclassification.RPCTests; |
| import org.apache.hadoop.hbase.testclassification.SmallTests; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| import org.mockito.Mockito; |
| |
| import org.apache.hbase.thirdparty.com.google.common.base.Charsets; |
| import org.apache.hbase.thirdparty.com.google.common.io.Files; |
| |
| @Category({RPCTests.class, SmallTests.class}) |
| public class TestBufferChain { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestBufferChain.class); |
| |
| private File tmpFile; |
| |
| private static final byte[][] HELLO_WORLD_CHUNKS = new byte[][] { |
| "hello".getBytes(Charsets.UTF_8), |
| " ".getBytes(Charsets.UTF_8), |
| "world".getBytes(Charsets.UTF_8) |
| }; |
| |
| @Before |
| public void setup() throws IOException { |
| tmpFile = File.createTempFile("TestBufferChain", "txt"); |
| } |
| |
| @After |
| public void teardown() { |
| tmpFile.delete(); |
| } |
| |
| @Test |
| public void testGetBackBytesWePutIn() { |
| ByteBuffer[] bufs = wrapArrays(HELLO_WORLD_CHUNKS); |
| BufferChain chain = new BufferChain(bufs); |
| assertTrue(Bytes.equals(Bytes.toBytes("hello world"), chain.getBytes())); |
| } |
| |
| @Test |
| public void testChainChunkBiggerThanWholeArray() throws IOException { |
| ByteBuffer[] bufs = wrapArrays(HELLO_WORLD_CHUNKS); |
| BufferChain chain = new BufferChain(bufs); |
| writeAndVerify(chain, "hello world", 8192); |
| assertNoRemaining(bufs); |
| } |
| |
| @Test |
| public void testChainChunkBiggerThanSomeArrays() throws IOException { |
| ByteBuffer[] bufs = wrapArrays(HELLO_WORLD_CHUNKS); |
| BufferChain chain = new BufferChain(bufs); |
| writeAndVerify(chain, "hello world", 3); |
| assertNoRemaining(bufs); |
| } |
| |
| @Test |
| public void testLimitOffset() throws IOException { |
| ByteBuffer[] bufs = new ByteBuffer[] { |
| stringBuf("XXXhelloYYY", 3, 5), |
| stringBuf(" ", 0, 1), |
| stringBuf("XXXXworldY", 4, 5) }; |
| BufferChain chain = new BufferChain(bufs); |
| writeAndVerify(chain , "hello world", 3); |
| assertNoRemaining(bufs); |
| } |
| |
| @Test |
| public void testWithSpy() throws IOException { |
| ByteBuffer[] bufs = new ByteBuffer[] { |
| stringBuf("XXXhelloYYY", 3, 5), |
| stringBuf(" ", 0, 1), |
| stringBuf("XXXXworldY", 4, 5) }; |
| BufferChain chain = new BufferChain(bufs); |
| FileOutputStream fos = new FileOutputStream(tmpFile); |
| FileChannel ch = Mockito.spy(fos.getChannel()); |
| try { |
| chain.write(ch, 2); |
| assertEquals("he", Files.toString(tmpFile, Charsets.UTF_8)); |
| chain.write(ch, 2); |
| assertEquals("hell", Files.toString(tmpFile, Charsets.UTF_8)); |
| chain.write(ch, 3); |
| assertEquals("hello w", Files.toString(tmpFile, Charsets.UTF_8)); |
| chain.write(ch, 8); |
| assertEquals("hello world", Files.toString(tmpFile, Charsets.UTF_8)); |
| } finally { |
| ch.close(); |
| fos.close(); |
| } |
| } |
| |
| private ByteBuffer stringBuf(String string, int position, int length) { |
| ByteBuffer buf = ByteBuffer.wrap(string.getBytes(Charsets.UTF_8)); |
| buf.position(position); |
| buf.limit(position + length); |
| assertTrue(buf.hasRemaining()); |
| return buf; |
| } |
| |
| private void assertNoRemaining(ByteBuffer[] bufs) { |
| for (ByteBuffer buf : bufs) { |
| assertFalse(buf.hasRemaining()); |
| } |
| } |
| |
| private ByteBuffer[] wrapArrays(byte[][] arrays) { |
| ByteBuffer[] ret = new ByteBuffer[arrays.length]; |
| for (int i = 0; i < arrays.length; i++) { |
| ret[i] = ByteBuffer.wrap(arrays[i]); |
| } |
| return ret; |
| } |
| |
| private void writeAndVerify(BufferChain chain, String string, int chunkSize) |
| throws IOException { |
| FileOutputStream fos = new FileOutputStream(tmpFile); |
| FileChannel ch = fos.getChannel(); |
| try { |
| long remaining = string.length(); |
| while (chain.hasRemaining()) { |
| long n = chain.write(ch, chunkSize); |
| assertTrue(n == chunkSize || n == remaining); |
| remaining -= n; |
| } |
| assertEquals(0, remaining); |
| } finally { |
| fos.close(); |
| } |
| assertFalse(chain.hasRemaining()); |
| assertEquals(string, Files.toString(tmpFile, Charsets.UTF_8)); |
| } |
| } |