jackson-annotations
Protobuf
jackson-annotations | Protobuf | |
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6 | 174 | |
1,006 | 63,657 | |
0.0% | 0.5% | |
8.0 | 10.0 | |
10 days ago | 7 days ago | |
Java | C++ | |
Apache License 2.0 | GNU General Public License v3.0 or later |
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jackson-annotations
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Consuming and Testing third party API's using Spring Webclient
The above class maps the json data to a java object we can work with. We use Lombok to generate constructors, getters and setters for our code and the Jackson Project to handle serialization and deserialization of json to pojo . We know the response is an array of objects representing the coffee and so above data structure is fit for this.
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When is the @JsonProperty property used and what is it used for?
Reading about this annotion on https://github.com/FasterXML/jackson-annotations/wiki/Jackson-Annotations I don't know when this is required to be used ?
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Marshaling objects in modern Java
If human-readability is required, use JSON, with Jackson or any other libraries.
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Alternatives to DTO
Regarding JSON specifically, we can delegate the process of providing the correct data to the serializer framework, e.g. Jackson. The idea behind it is the following: the main code processes the entity as usual, and at the edge, a Jackson converter converts it to the required JSON structure.
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Java Pitfalls: Unboxing null Booleans
In either of these cases, most Java developers will use a JSON-to-Java conversion library, such as Jackson, to map the JSON object to a Java object. These libraries can be configured to default the value of wasDelivered on the resulting Java object to false or true, but more often either of the above cases will just result in the value being null.
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[Jackson] Deserialize nested value in top level field
Not a feature yet, but has been requested : https://github.com/FasterXML/jackson-annotations/issues/42
Protobuf
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Hitting every branch on the way down
It's because they changed the versioning format: https://github.com/protocolbuffers/protobuf/releases?page=5
But I suppose old version still receive bugfixes.
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Reverse Engineering Protobuf Definitions from Compiled Binaries
For at least 4 years protobuf has had decent support for self-describing messages (very similar to avro) as well as reflection
https://github.com/protocolbuffers/protobuf/blob/main/src/go...
Xgooglers trying to make do on the cheap will just create a Union of all their messages and include the message def in a self-describing message pattern. Super-sensitive network I/O can elide the message def (empty buffer) and any for RecordIO clone well file compression takes care of the definition.
Definitely useful to be able to dig out old defs but protobuf maintainers have surprisingly added useful features so you don’t have to.
Bonus points tho for extracting the protobuf defs that e.g. Apple bakes into their binaries.
- Show HN: AuthWin – Authenticator App for Windows
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Create Production-Ready SDKs With gRPC Gateway
gRPC Gateway is a protoc plugin that reads gRPC service definitions and generates a reverse proxy server that translates a RESTful JSON API into gRPC.
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Create Production-Ready SDKs with Goa
To use more recent versions of protoc in future applications, you can download them from the Protobuf repository.
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Roll your own auth with Rust and Protobuf
Use the Protobuf CLI protoc and the plugin protoc-gen-tonic.
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Add extra stuff to a “standard” encoding? Sure, why not
> didn’t find any standard for separating protobuf messages
The fact that protobufs are not self-delimiting is an endless source of frustration, but I know of 2 standards:
- SerializeDelimited* is part of the protobuf library: https://github.com/protocolbuffers/protobuf/blob/main/src/go...
- Riegeli is "a file format for storing a sequence of string records, typically serialized protocol buffers. It supports dense compression, fast decoding, seeking, detection and optional skipping of data corruption, filtering of proto message fields for even faster decoding, and parallel encoding": https://github.com/google/riegeli
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Block YouTube Ads on AppleTV by Decrypting and Stripping Ads from Profobuf
It looks like it is in fact universal. Just glancing at the code here, it looks like the tool searches any arbitrary file for bytes that look like encoded protobuf descriptors, specifically looking for bytes that are plausibly the beginning of a FileDescriptorProto message defined here:
https://github.com/protocolbuffers/protobuf/blob/main/src/go...
This takes advantage of the fact that such descriptors are commonly compiled into programs that use protobuf. The descriptors are usually embedded as constant byte arrays. That said, not all protobuf implementations embed the descriptors and those that do often have an option to inhibit such embedding (at the expense of losing some dynamic introspection features).
- How to learn to use protoc in 21 easily infuriating steps
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What's involved in protobuf encoding?
Not much. You can check the source code in https://github.com/protocolbuffers/protobuf. For example, for serializing a boolean in C#: https://github.com/protocolbuffers/protobuf/blob/main/csharp/src/Google.Protobuf/WritingPrimitives.cs#L165. Strings and objects are a bit more complicated, but it is all about turning the data into its byte representation.
What are some alternatives?
Jolt - JSON to JSON transformation library written in Java.
FlatBuffers - FlatBuffers: Memory Efficient Serialization Library
Kryo - Java binary serialization and cloning: fast, efficient, automatic
SBE - Simple Binary Encoding (SBE) - High Performance Message Codec
MessagePack - MessagePack implementation for C and C++ / msgpack.org[C/C++]
cereal - A C++11 library for serialization
Apache Parquet - Apache Parquet
Bond - Bond is a cross-platform framework for working with schematized data. It supports cross-language de/serialization and powerful generic mechanisms for efficiently manipulating data. Bond is broadly used at Microsoft in high scale services.
Protobuf.NET - Protocol Buffers library for idiomatic .NET
Boost.Serialization - Boost.org serialization module
Apache Avro - Apache Avro is a data serialization system.
Cap'n Proto - Cap'n Proto serialization/RPC system - core tools and C++ library