mirror of https://github.com/apache/kafka.git
71e85f5e84
This patch adds a framework to automatically generate the request/response classes for Kafka's protocol. The code will be updated to use the generated classes in follow-up patches. Below is a brief summary of the included components: **buildSrc/src** The message generator code is here. This code is automatically re-run by gradle when one of the schema files changes. The entire directory is processed at once to minimize the number of times we have to start a new JVM. We use Jackson to translate the JSON files into Java objects. **clients/src/main/java/org/apache/kafka/common/protocol/Message.java** This is the interface implemented by all automatically generated messages. **clients/src/main/java/org/apache/kafka/common/protocol/MessageUtil.java** Some utility functions used by the generated message code. **clients/src/main/java/org/apache/kafka/common/protocol/Readable.java, Writable.java, ByteBufferAccessor.java** The generated message code uses these classes for writing to a buffer. **clients/src/main/message/README.md** This README file explains how the JSON schemas work. **clients/src/main/message/\*.json** The JSON files in this directory implement every supported version of every Kafka API. The unit tests automatically validate that the generated schemas match the hand-written schemas in our code. Additionally, there are some things like request and response headers that have schemas here. **clients/src/main/java/org/apache/kafka/common/utils/ImplicitLinkedHashSet.java** I added an optimization here for empty sets. This is useful here because I want all messages to start with empty sets by default prior to being loaded with data. This is similar to the "empty list" optimizations in the `java.util.ArrayList` class. Reviewers: Stanislav Kozlovski <stanislav_kozlovski@outlook.com>, Ismael Juma <ismael@juma.me.uk>, Bob Barrett <bob.barrett@outlook.com>, Jason Gustafson <jason@confluent.io> |
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| resources | ||
| buildscript.gradle | ||
| dependencies.gradle | ||
| rat.gradle | ||
| spotbugs-exclude.xml | ||