87 lines
3.4 KiB
Java
87 lines
3.4 KiB
Java
/*
|
|
* Copyright 2020 The Netty Project
|
|
*
|
|
* The Netty Project 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:
|
|
*
|
|
* https://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 io.netty.buffer.api.tests.examples;
|
|
|
|
import io.netty.buffer.api.Buffer;
|
|
import io.netty.buffer.api.BufferAllocator;
|
|
import io.netty.buffer.api.CompositeBuffer;
|
|
import io.netty.buffer.api.Send;
|
|
|
|
import java.nio.channels.FileChannel;
|
|
import java.nio.file.Path;
|
|
import java.util.concurrent.ArrayBlockingQueue;
|
|
import java.util.concurrent.ExecutorService;
|
|
import java.util.concurrent.Executors;
|
|
|
|
import static java.nio.file.StandardOpenOption.CREATE;
|
|
import static java.nio.file.StandardOpenOption.READ;
|
|
import static java.nio.file.StandardOpenOption.TRUNCATE_EXISTING;
|
|
import static java.nio.file.StandardOpenOption.WRITE;
|
|
|
|
public final class FileCopyExample {
|
|
public static void main(String[] args) throws Exception {
|
|
ExecutorService executor = Executors.newFixedThreadPool(2);
|
|
ArrayBlockingQueue<Send<Buffer>> queue = new ArrayBlockingQueue<>(8);
|
|
try (BufferAllocator allocator = BufferAllocator.offHeapPooled();
|
|
var input = FileChannel.open(Path.of("/dev/urandom"), READ);
|
|
var output = FileChannel.open(Path.of("random.bin"), CREATE, TRUNCATE_EXISTING, WRITE)) {
|
|
Send<Buffer> done = CompositeBuffer.compose(allocator).send();
|
|
|
|
var reader = executor.submit(() -> {
|
|
for (int i = 0; i < 1024; i++) {
|
|
try (Buffer in = allocator.allocate(1024)) {
|
|
System.out.println("in = " + in);
|
|
in.forEachWritable(0, (index, component) -> {
|
|
var bb = component.writableBuffer();
|
|
while (bb.hasRemaining()) {
|
|
input.read(bb);
|
|
}
|
|
return true;
|
|
});
|
|
System.out.println("Sending " + in.readableBytes() + " bytes.");
|
|
queue.put(in.send());
|
|
}
|
|
}
|
|
queue.put(done);
|
|
return null;
|
|
});
|
|
|
|
var writer = executor.submit(() -> {
|
|
Send<Buffer> send;
|
|
while ((send = queue.take()) != done) {
|
|
try (Buffer out = send.receive()) {
|
|
System.out.println("Received " + out.readableBytes() + " bytes.");
|
|
out.forEachReadable(0, (index, component) -> {
|
|
var bb = component.readableBuffer();
|
|
while (bb.hasRemaining()) {
|
|
output.write(bb);
|
|
}
|
|
return true;
|
|
});
|
|
}
|
|
}
|
|
output.force(true);
|
|
return null;
|
|
});
|
|
|
|
reader.get();
|
|
writer.get();
|
|
} finally {
|
|
executor.shutdown();
|
|
}
|
|
}
|
|
}
|