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The build-branch workflow is divided into a number of different jobs, most of which run in parallel. Each job is described below.

Use of GA's build matrix feature

Some of the jobs are defined using GA's "build matrix" feature. This allows you define similar jobs with a single job definition. Any differences are specified by a list of values for a specific key. For example, the "compile" job uses the matrix feature to generate the images with different versions of java. There, the matrix is specified by the "java" key which has a list of values describing which version of java to use, (8 or 11.)

Use of GA's fail-fast flag

The jobs currently using the "build matrix" feature are: "compile", "basic", "acceptance" and "integration". These jobs also use GA's fail-fast flag to cancel the other jobs in the same matrix, if one fails. For example, in the "compile" job, if the java 8 build fails, the java 11 build will be cancelled due to this flag, but the other jobs outside the "compile" matrix are unaffected.

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