Example usage for io.vertx.core.file AsyncFile write

Introduction

In this page you can find the example usage for io.vertx.core.file AsyncFile write.

Prototype

void write(Buffer buffer, long position, Handler<AsyncResult<Void>> handler);

Source Link

Document

Write a io.vertx.core.buffer.Buffer to the file at position position in the file, asynchronously.

Usage

From source file:examples.FileSystemExamples.java

License:Open Source License

public void asyncFileWrite() {
    Vertx vertx = Vertx.vertx();/*from  w ww .  j  a v  a  2 s .co  m*/
    vertx.fileSystem().open("target/classes/hello.txt", new OpenOptions(), result -> {
        if (result.succeeded()) {
            AsyncFile file = result.result();
            Buffer buff = Buffer.buffer("foo");
            for (int i = 0; i < 5; i++) {
                file.write(buff, buff.length() * i, ar -> {
                    if (ar.succeeded()) {
                        System.out.println("Written ok!");
                        // etc
                    } else {
                        System.err.println("Failed to write: " + ar.cause());
                    }
                });
            }
        } else {
            System.err.println("Cannot open file " + result.cause());
        }
    });
}

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