add dart

.gitignore

@@ -31,3 +31,4 @@ target/
 .vs/
 
 *.log
+.packages

dart/emit_log.dart

@@ -0,0 +1,21 @@
+import "package:dart_amqp/dart_amqp.dart";
+
+void main (List<String> arguments) {
+    ConnectionSettings settings = new ConnectionSettings(
+        host: "localhost"
+    );
+
+    Client client = new Client(settings: settings);
+
+    String msg = arguments.isEmpty ? "Hello World!" : arguments[0];
+
+    client
+        .channel()
+        .then((Channel channel) =>
+                channel.exchange("logs", ExchangeType.FANOUT, durable: false))
+        .then((Exchange exchange) {
+            exchange.publish(msg, null);
+            print(" [x] Sent ${msg}");
+            return client.close();
+        });
+}

dart/emit_log_direct.dart

@@ -0,0 +1,23 @@
+import "package:dart_amqp/dart_amqp.dart";
+
+void main(List<String> arguments) {
+    ConnectionSettings settings = new ConnectionSettings(
+        host: "localhost"
+    );
+
+    Client client = new Client(settings: settings);
+
+    String routingKey = arguments.length < 1 ? "info" : arguments[0];
+    String msg = arguments.length < 2 ? "Hello World!" : arguments[1];
+
+    client
+        .channel()
+        .then((Channel channel) =>
+                channel.exchange("direct_logs", ExchangeType.DIRECT,
+                        durable: false))
+        .then((Exchange exchange) {
+            exchange.publish(msg, routingKey);
+            print(" [x] Sent ${routingKey}: ${msg}");
+            return client.close();
+        });
+}

dart/emit_log_topic.dart

@@ -0,0 +1,23 @@
+import "package:dart_amqp/dart_amqp.dart";
+
+void main(List<String> arguments) {
+    ConnectionSettings settings = new ConnectionSettings(
+        host: "localhost"
+    );
+
+    Client client = new Client(settings: settings);
+
+    String routingKey = arguments.length < 1 ? "anonymous.info" : arguments[0];
+    String msg = arguments.length < 2 ? "Hello World!" : arguments[1];
+
+    client
+        .channel()
+        .then((Channel channel) =>
+                channel.exchange("topic_logs", ExchangeType.TOPIC,
+                        durable: false))
+        .then((Exchange exchange) {
+            exchange.publish(msg, routingKey);
+            print(" [x] Sent ${routingKey}: ${msg}");
+            return client.close();
+        });
+}

dart/new_task.dart

@@ -0,0 +1,24 @@
+import "package:dart_amqp/dart_amqp.dart";
+
+void main(List<String> arguments) {
+    ConnectionSettings settings = new ConnectionSettings(
+        host: "localhost"
+    );
+
+    Client client = new Client(settings: settings);
+
+    String consumeTag = "task_queue";
+    String msg = arguments.isEmpty ? "Hello World!" : arguments[0];
+
+    MessageProperties properties = new MessageProperties.persistentMessage();
+
+    client
+        .channel()
+        .then((Channel channel) =>
+                channel.queue(consumeTag, durable: true))
+        .then((Queue queue) {
+            queue.publish(msg, properties: properties);
+            print(" [x] Sent ${msg}");
+            return client.close();
+        });
+}

dart/pubspec.lock

@@ -0,0 +1,19 @@
+# Generated by pub
+# See https://www.dartlang.org/tools/pub/glossary#lockfile
+packages:
+  dart_amqp:
+    dependency: "direct main"
+    description:
+      name: dart_amqp
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.1"
+  logging:
+    dependency: transitive
+    description:
+      name: logging
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.11.3+2"
+sdks:
+  dart: ">=2.0.0-dev <3.0.0"

dart/pubspec.yaml

@@ -0,0 +1,3 @@
+name: dart_rabbitmq_example
+dependencies:
+    dart_amqp: 0.1.1

dart/receive.dart

@@ -0,0 +1,34 @@
+import "dart:io";
+import "package:dart_amqp/dart_amqp.dart";
+
+void main (List<String> arguments) {
+    ConnectionSettings settings = new ConnectionSettings(
+        host: "localhost"
+    );
+
+    Client client = new Client(settings: settings);
+
+    ProcessSignal.sigint.watch().listen((_) {
+        client.close().then((_) {
+            print("close client");
+            exit(0);
+        });
+    });
+
+    String msg = arguments.isEmpty ? "Hello World!": arguments[0];
+
+    String queueTag = "hello";
+
+    client
+        .channel()
+        .then((Channel channel) => channel.queue(queueTag, durable: false))
+        .then((Queue queue) {
+            print(" [*] Waiting for messages in ${queueTag}. To Exit press CTRL+C");
+            return queue.consume(consumerTag: queueTag, noAck: true);
+        })
+        .then((Consumer consumer) {
+            consumer.listen((AmqpMessage event) {
+                print(" [x] Received ${event.payloadAsString}");
+            });
+        });
+}

dart/receive_logs.dart

@@ -0,0 +1,34 @@
+import "dart:io";
+import "package:dart_amqp/dart_amqp.dart";
+
+void main (List<String> arguments) {
+    ConnectionSettings settings = new ConnectionSettings(
+        host: "localhost"
+    );
+
+    Client client = new Client(settings: settings);
+
+    ProcessSignal.sigint.watch().listen((_) {
+        client.close().then((_) {
+            print("close client");
+            exit(0);
+        });
+    });
+
+    String msg = arguments.isEmpty ? "Hello World!": arguments[0];
+
+    client
+        .channel()
+        .then((Channel channel) {
+            return channel.exchange("logs", ExchangeType.FANOUT, durable: false);
+        })
+        .then((Exchange exchange) {
+            print(" [*] Waiting for messages in logs. To Exit press CTRL+C");
+            return exchange.bindPrivateQueueConsumer(null);
+        })
+        .then((Consumer consumer) {
+            consumer.listen((AmqpMessage event) {
+                print(" [x] Received ${event.payloadAsString}");
+            });
+        });
+}

dart/receive_logs_direct.dart

@@ -0,0 +1,40 @@
+import "dart:io";
+import "package:dart_amqp/dart_amqp.dart";
+
+void main (List<String> arguments) {
+    if (arguments.isEmpty) {
+        print("Usage: receive_logs_direct.dart [info] [warning] [error]");
+        return;
+    }
+
+    ConnectionSettings settings = new ConnectionSettings(
+        host: "localhost"
+    );
+
+    Client client = new Client(settings: settings);
+
+    ProcessSignal.sigint.watch().listen((_) {
+        client.close().then((_) {
+            print("close client");
+            exit(0);
+        });
+    });
+
+    List<String> routingKeys = arguments.sublist(0, 1);
+    client
+        .channel()
+        .then((Channel channel) {
+            return channel.exchange("direct_logs", ExchangeType.DIRECT, durable: false);
+        })
+        .then((Exchange exchange) {
+            print(" [*] Waiting for messages in logs. To Exit press CTRL+C");
+            return exchange.bindPrivateQueueConsumer(routingKeys,
+                consumerTag: "direct_logs", noAck: true
+            );
+        })
+        .then((Consumer consumer) {
+            consumer.listen((AmqpMessage event) {
+                print(" [x] ${event.routingKey}:'${event.payloadAsString}'");
+            });
+        });
+}

dart/receive_logs_topic.dart

@@ -0,0 +1,40 @@
+import "dart:io";
+import "package:dart_amqp/dart_amqp.dart";
+
+void main (List<String> arguments) {
+    if (arguments.isEmpty) {
+        print("Usage: receive_logs_direct.dart <facility>.<routingKey>");
+        return;
+    }
+
+    ConnectionSettings settings = new ConnectionSettings(
+        host: "localhost"
+    );
+
+    Client client = new Client(settings: settings);
+
+    ProcessSignal.sigint.watch().listen((_) {
+        client.close().then((_) {
+            print("close client");
+            exit(0);
+        });
+    });
+
+    List<String> routingKeys = arguments.sublist(0, 1);
+    client
+        .channel()
+        .then((Channel channel) {
+            return channel.exchange("topic_logs", ExchangeType.TOPIC, durable: false);
+        })
+        .then((Exchange exchange) {
+            print(" [*] Waiting for messages in logs. To Exit press CTRL+C");
+            return exchange.bindPrivateQueueConsumer(routingKeys,
+                consumerTag: "topic_logs", noAck: true
+            );
+        })
+        .then((Consumer consumer) {
+            consumer.listen((AmqpMessage event) {
+                print(" [x] ${event.routingKey}:'${event.payloadAsString}'");
+            });
+        });
+}

dart/rpc_client.dart

@@ -0,0 +1,80 @@
+import "dart:io";
+import "dart:async";
+import "dart:math";
+import "package:dart_amqp/dart_amqp.dart";
+
+var UUID = () => "${(new Random()).nextDouble()}";
+
+class RPCClient {
+    Client client;
+    String queueTag;
+    String _replyQueueTag;
+    Completer contextChannel;
+    Map<String, Completer> _channels = new Map<String, Completer>();
+    Queue _queue;
+    RPCClient() : client = new Client(),
+        queueTag = "rpc_queue" {
+        contextChannel = new Completer();
+        client
+        .channel()
+        .then((Channel channel) => channel.queue(queueTag))
+        .then((Queue rpcQueue) {
+            _queue = rpcQueue;
+            return rpcQueue.channel.privateQueue();
+        })
+        .then((Queue rpcQueue) {
+            rpcQueue.consume(noAck: true)
+                .then((Consumer consumer) {
+                    _replyQueueTag = consumer.queue.name;
+                    consumer.listen(handler);
+                    contextChannel.complete();
+                });
+        });
+    }
+
+    void handler (AmqpMessage event) {
+        if (!_channels
+            .containsKey(
+                event.properties.corellationId)) return;
+        print(" [.] Got ${event.payloadAsString}");
+        _channels
+            .remove(event.properties.corellationId)
+            .complete(event.payloadAsString);
+    }
+
+    Future<String> call(int n) {
+        return contextChannel.future
+            .then((_) {
+                String uuid = UUID();
+                Completer<String> channel = new Completer<String>();
+                MessageProperties properties = new MessageProperties()
+                    ..replyTo = _replyQueueTag
+                    ..corellationId = uuid;
+                _channels[uuid] = channel;
+                print(" [x] Requesting ${n}");
+                _queue.publish({"n": n}, properties: properties);
+                return channel.future;
+            });
+    }
+
+    Future close() {
+        _channels.forEach((_, var next) => next.complete("RPC client closed"));
+        _channels.clear();
+        client.close();
+    }
+}
+
+void main(List<String> arguments) {
+    if (arguments.isEmpty) {
+        print("Usage: rpc_client.dart num");
+        return;
+    }
+    RPCClient client = new RPCClient();
+    int n = arguments.isEmpty ? 30 : num.parse(arguments[0]);
+    client.call(n)
+        .then((String res) {
+            print(" [x] fib(${n}) = ${res}");
+        })
+        .then((_) => client.close())
+        .then((_) => null);
+}

dart/rpc_server.dart

@@ -0,0 +1,36 @@
+import "dart:io";
+import "package:dart_amqp/dart_amqp.dart";
+
+// Slow implementation of fib
+int fib(int n) {
+  if (n >= 0 && n <= 1) {
+    return n;
+  } else
+  return fib(n - 1) + fib(n - 2);
+}
+
+void main(List<String> args) {
+
+  Client client = new Client();
+
+  // Setup a signal handler to cleanly exit if CTRL+C is pressed
+  ProcessSignal.sigint.watch().listen((_) {
+    client.close().then((_) {
+      exit(0);
+    });
+  });
+
+  client
+  .channel()
+  .then((Channel channel) => channel.qos(0, 1))
+  .then((Channel channel) => channel.queue("rpc_queue"))
+  .then((Queue queue) => queue.consume())
+  .then((Consumer consumer) {
+    print(" [x] Awaiting RPC request");
+    consumer.listen((AmqpMessage message) {
+      var n = message.payloadAsJson["n"];
+      print(" [.] fib(${n})");
+      message.reply(fib(n).toString());
+    });
+  });
+}