static void XmlSerializeV10(XmlCloudEventV10 ev, Stream stream)
{
using (var sw = new XmlTextWriter(new StreamWriter(stream, Encoding.UTF8, 8192, true)))
{
sw.Formatting = System.Xml.Formatting.Indented;
xmlSerializerV10.Serialize(sw, ev);
sw.Flush();
}
}
static void Main(string[] args)
{
// The initial object is created as a 1.0 object, with five extensions added into a bag in the
// in-memory serializer object for JSON.
ICloudEventV10 cloudEvent = new JsonCloudEventV10
{
cloudEventsVersion = "1.0",
contentType = null,
eventID = "12345678",
eventTime = DateTime.UtcNow,
eventType = "test.type",
eventTypeVersion = "1.0",
source = "urn:test",
Extensions = new Dictionary <string, JToken>
{
{ "myextension", "abcdef" },
{ "yourextension", "ghijkl" },
{ "theirextension", "mnopqr" },
{ "extraThing1", "stuvwx" },
{ "extraThing2", "yzabcd" }
}
};
// The object is then serialized to JSON, where the
// extensions show up as flat object members of the envelope.
Console.WriteLine("--- JSON 1.0");
MemoryStream memoryStream = new MemoryStream();
JsonSerialize(cloudEvent, memoryStream);
memoryStream.Position = 0;
DumpTextStream(memoryStream);
// When the object is deserialized into 1.0, the elements go back into the bag. That's simply
// a function of the chosen serializer, JSON.NET.
Console.WriteLine("JSON: ----- Deserialize as 1.0 > 1.0");
memoryStream.Position = 0;
var jsonCloudEventV10 = JsonDeserialize <JsonCloudEventV10>(memoryStream);
foreach (var extension in jsonCloudEventV10.Extensions)
{
Console.WriteLine($"1.0 extension {extension.Key}: {extension.Value}");
}
// When the object is deserialized into 1.1, the `extraThing1` and `extraThing2` properties
// and populated from the content, and the remaining extensions go into the bag. Again, that's
// a function of the serializer.
Console.WriteLine("JSON: ----- Deserialize 1.0 > 1.1");
memoryStream.Position = 0;
var jsonCloudEventV11 = JsonDeserialize <JsonCloudEventV11>(memoryStream);
Console.WriteLine($"1.1 builtin extraThing1 {jsonCloudEventV11.extraThing1}");
Console.WriteLine($"1.1 builtin extraThing2 {jsonCloudEventV11.extraThing2}");
foreach (var extension in jsonCloudEventV11.Extensions)
{
Console.WriteLine($"1.1 extension {extension.Key}: {extension.Value}");
}
// Because the wire repersentation doesn't make a difference between the extensions in 1.0 and 1.1,
// you'll see that serializing the resulting 1.1 in-memory object and reading it back as 1.0 or
// 1.1 yields the exact same expected results.
Console.WriteLine("--- JSON 1.1");
memoryStream = new MemoryStream();
JsonSerialize(jsonCloudEventV11, memoryStream);
memoryStream.Position = 0;
DumpTextStream(memoryStream);
Console.WriteLine("JSON: ----- Deserialize as 1.1 > 1.0");
memoryStream.Position = 0;
jsonCloudEventV10 = JsonDeserialize <JsonCloudEventV10>(memoryStream);
foreach (var extension in jsonCloudEventV10.Extensions)
{
Console.WriteLine($"1.0 extension {extension.Key}: {extension.Value}");
}
Console.WriteLine("JSON: ----- Deserialize 1.1 > 1.1");
memoryStream.Position = 0;
jsonCloudEventV11 = JsonDeserialize <JsonCloudEventV11>(memoryStream);
Console.WriteLine($"1.1 builtin extraThing1 {jsonCloudEventV11.extraThing1}");
Console.WriteLine($"1.1 builtin extraThing2 {jsonCloudEventV11.extraThing2}");
foreach (var extension in jsonCloudEventV11.Extensions)
{
Console.WriteLine($"1.1 extension {extension.Key}: {extension.Value}");
}
// The XML CloudEvents 1.0 in-memory object is created as a deep copy from the JSON 1.1 object,
// showing that there's nothing precluding extensions to be copied across different objects tailored
// to different serializers.
var xmlCloudEvent = new XmlCloudEventV10(jsonCloudEventV11);
// The rest of the XML flow is exactly equivalent to JSON. The data on the wire shows up flat and
// we're using the serializer's facility to deal with unknown objects to handle extensions.
Console.WriteLine("--- XML 1.0");
memoryStream = new MemoryStream();
XmlSerializeV10(xmlCloudEvent, memoryStream);
memoryStream.Position = 0;
DumpTextStream(memoryStream);
Console.WriteLine("XML: ----- Deserialize 1.0 > 1.0");
memoryStream.Position = 0;
var xmlCloudEventV10 = XmlDeserializeV10(memoryStream);
foreach (var extension in xmlCloudEventV10.AllElements)
{
Console.WriteLine($"1.0 extension {extension.Name}: {extension.InnerText}");
}
Console.WriteLine("XML: ----- Deserialize 1.0 > 1.1");
memoryStream.Position = 0;
var xmlCloudEventV11 = XmlDeserializeV11(memoryStream);
Console.WriteLine($"1.1 builtin extraThing1 {xmlCloudEventV11.extraThing1}");
Console.WriteLine($"1.1 builtin extraThing2 {xmlCloudEventV11.extraThing2}");
foreach (var extension in xmlCloudEventV11.AllElements)
{
Console.WriteLine($"1.1 extension {extension.Name}: {extension.InnerText}");
}
Console.WriteLine("--- XML 1.1");
memoryStream = new MemoryStream();
XmlSerializeV11(xmlCloudEventV11, memoryStream);
memoryStream.Position = 0;
DumpTextStream(memoryStream);
Console.WriteLine("XML: ----- Deserialize 1.1 > 1.0");
memoryStream.Position = 0;
xmlCloudEventV10 = XmlDeserializeV10(memoryStream);
foreach (var extension in xmlCloudEventV10.AllElements)
{
Console.WriteLine($"1.0 extension {extension.Name}: {extension.InnerText}");
}
Console.WriteLine("XML: ----- Deserialize 1.1 > 1.1");
memoryStream.Position = 0;
xmlCloudEventV11 = XmlDeserializeV11(memoryStream);
Console.WriteLine($"1.1 builtin extraThing1 {xmlCloudEventV11.extraThing1}");
Console.WriteLine($"1.1 builtin extraThing2 {xmlCloudEventV11.extraThing2}");
foreach (var extension in xmlCloudEventV11.AllElements)
{
Console.WriteLine($"1.1 extension {extension.Name}: {extension.InnerText}");
}
// The Thrift and Protobuf handling is practically identical. The Thrift and Protobuf serializers are
// using an attribute driven model and not the respective IDL compiler, but the
// result is wire compatible.
// The strategy here is to make an extension bag and for the in memory respresentation and to also use
// that bag on the wire, because both require schema.
Console.WriteLine("--- Thrift 1.0");
var thriftCloudEvent = new ThriftCloudEventV10(xmlCloudEventV11);
memoryStream = new MemoryStream();
ThriftSerializeV10(thriftCloudEvent, memoryStream);
memoryStream.Position = 0;
DumpBinaryStream(memoryStream);
Console.WriteLine("THRIFT: ----- Deserialize 1.0 > 1.0");
memoryStream.Position = 0;
var thriftCloudEventV10 = ThriftDeserializeV10(memoryStream);
foreach (var extension in thriftCloudEventV10.extensions)
{
Console.WriteLine($"1.0 extension {extension.Key}: {extension.Value}");
}
// Specifically
Console.WriteLine("THRIFT: ----- Deserialize 1.0 > 1.1");
memoryStream.Position = 0;
var thriftCloudEventV11 = ThriftDeserializeV11(memoryStream);
Console.WriteLine($"1.1 builtin extraThing1 {thriftCloudEventV11.extraThing1}");
Console.WriteLine($"1.1 builtin extraThing2 {thriftCloudEventV11.extraThing2}");
foreach (var extension in thriftCloudEventV11.extensions)
{
Console.WriteLine($"1.0 extension {extension.Key}: {extension.Value}");
}
Console.WriteLine("--- Thrift 1.1");
thriftCloudEventV11 = new ThriftCloudEventV11(thriftCloudEventV10);
memoryStream = new MemoryStream();
ThriftSerializeV11(thriftCloudEventV11, memoryStream);
memoryStream.Position = 0;
DumpBinaryStream(memoryStream);
Console.WriteLine("THRIFT: ----- Deserialize 1.1 > 1.1");
memoryStream.Position = 0;
thriftCloudEventV11 = ThriftDeserializeV11(memoryStream);
Console.WriteLine($"1.1 builtin extraThing1 {thriftCloudEventV11.extraThing1}");
Console.WriteLine($"1.1 builtin extraThing2 {thriftCloudEventV11.extraThing2}");
foreach (var extension in thriftCloudEventV11.extensions)
{
Console.WriteLine($"1.1 extension {extension.Key}: {extension.Value}");
}
Console.WriteLine("--- Protobuf 1.0");
var protobufCloudEvent = new ProtobufCloudEventV10(xmlCloudEventV11);
memoryStream = new MemoryStream();
ProtobufSerializeV10(protobufCloudEvent, memoryStream);
memoryStream.Position = 0;
DumpBinaryStream(memoryStream);
Console.WriteLine("PROTOBUF: ----- Deserialize 1.0 > 1.0");
memoryStream.Position = 0;
var protobufCloudEventV10 = ProtobufDeserializeV10(memoryStream);
foreach (var extension in protobufCloudEventV10.extensions)
{
Console.WriteLine($"1.0 extension {extension.Key}: {extension.Value}");
}
Console.WriteLine("PROTOBUF: ----- Deserialize 1.0 > 1.1");
memoryStream.Position = 0;
var protobufCloudEventV11 = ProtobufDeserializeV11(memoryStream);
Console.WriteLine($"1.1 builtin extraThing1 {protobufCloudEventV11.extraThing1}");
Console.WriteLine($"1.1 builtin extraThing2 {protobufCloudEventV11.extraThing2}");
foreach (var extension in protobufCloudEventV11.extensions)
{
Console.WriteLine($"1.0 extension {extension.Key}: {extension.Value}");
}
Console.WriteLine("--- Protobuf 1.1");
protobufCloudEventV11 = new ProtobufCloudEventV11(protobufCloudEventV10);
memoryStream = new MemoryStream();
ProtobufSerializeV11(protobufCloudEventV11, memoryStream);
memoryStream.Position = 0;
DumpBinaryStream(memoryStream);
Console.WriteLine("PROTOBUF: ----- Deserialize 1.1 > 1.1");
memoryStream.Position = 0;
protobufCloudEventV11 = ProtobufDeserializeV11(memoryStream);
Console.WriteLine($"1.1 builtin extraThing1 {protobufCloudEventV11.extraThing1}");
Console.WriteLine($"1.1 builtin extraThing2 {protobufCloudEventV11.extraThing2}");
foreach (var extension in protobufCloudEventV11.extensions)
{
Console.WriteLine($"1.1 extension {extension.Key}: {extension.Value}");
}
}