Overview of Sockets API for Java 8

Python 2.7/3 |Java 8/11 |PHP 5/7 |Ruby |Go 1.11 / 1.12+ |Node.js

This API is not recommended. Sockets are not available in newer App Engine standard runtimes. Apps that use this API can only run in the Java 8 App Engine runtime.

Beta

This product or feature is covered by the Pre-GA Offerings Terms of the Google Cloud Platform Terms of Service. Pre-GA products and features may have limited support, and changes to pre-GA products and features may not be compatible with other pre-GA versions. For more information, see the launch stage descriptions.

Applications in the Java 8 runtime can use native Java sockets with no restrictions, including the use of NIO classes and their methods.

Traffic from sockets is billed as outgoing bandwidth. The supported options are:

• SO_KEEPALIVE
• SO_DEBUG
• TCP_NODELAY
• SO_LINGER
• SO_OOBINLINE
• SO_SNDBUF
• SO_RCVBUF
• SO_REUSEADDR

Using sockets with the development server

You can run and test code using sockets on the development server, without using any special command line parameters.