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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
part of bindings;
abstract class Client extends core.MojoEventStreamListener {
Map<int, Completer> _completerMap;
int _nextId = 0;
Client(core.MojoMessagePipeEndpoint endpoint) :
_completerMap = {},
super(endpoint);
Client.fromHandle(core.MojoHandle handle) :
_completerMap = {},
super.fromHandle(handle);
Client.unbound() :
_completerMap = {},
super.unbound();
void handleResponse(ServiceMessage reader);
void handleRead() {
// Query how many bytes are available.
var result = endpoint.query();
assert(result.status.isOk || result.status.isResourceExhausted);
// Read the data.
var bytes = new ByteData(result.bytesRead);
var handles = new List<core.MojoHandle>(result.handlesRead);
result = endpoint.read(bytes, result.bytesRead, handles);
assert(result.status.isOk || result.status.isResourceExhausted);
var message = new ServiceMessage.fromMessage(new Message(bytes, handles));
handleResponse(message);
}
void handleWrite() {
throw 'Unexpected write signal in client.';
}
void sendMessage(Struct message, int name) {
if (!isOpen) {
listen();
}
var header = new MessageHeader(name);
var serviceMessage = message.serializeWithHeader(header);
endpoint.write(serviceMessage.buffer,
serviceMessage.buffer.lengthInBytes,
serviceMessage.handles);
if (!endpoint.status.isOk) {
throw "message pipe write failed";
}
}
Future sendMessageWithRequestId(
Struct message, int name, int id, int flags) {
if (!isOpen) {
listen();
}
if (id == -1) {
id = _nextId++;
}
var header = new MessageHeader.withRequestId(name, flags, id);
var serviceMessage = message.serializeWithHeader(header);
endpoint.write(serviceMessage.buffer,
serviceMessage.buffer.lengthInBytes,
serviceMessage.handles);
if (!endpoint.status.isOk) {
throw "message pipe write failed";
}
var completer = new Completer();
_completerMap[id] = completer;
return completer.future;
}
// Need a getter for this for access in subclasses.
Map<int, Completer> get completerMap => _completerMap;
}
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