compiler

Type Members

1. class Eval extends AnyRef

   

   Evaluates files, strings, or input streams as Scala code, and returns the result.

   Evaluates files, strings, or input streams as Scala code, and returns the result.

   If target is None, the results are compiled to memory (and are therefore ephemeral). If target is Some(path), the path must point to a directory, and classes will be saved into that directory.

   Eval also supports a limited set of preprocessors. Currently, "limited" means "exactly one": directives of the form #include <file>.

   The flow of evaluation is: - extract a string of code from the file, string, or input stream - run preprocessors on that string - wrap processed code in an apply method in a generated class - compile the class - contruct an instance of that class - return the result of apply()

2. sealed trait EvalThreadingModel extends AnyRef

   

   The type of threading model to use for compilation within the com.eharmony.aloha.semantics.compiled.compiler.TwitterEvalCompiler.

3. case class TwitterEvalCompiler(threadingModel: EvalThreadingModel = SingleThreadedEval, classCacheDir: Option[File] = None, imports: Seq[String] = Nil) extends ContainerReadableByString[Try] with Logging with Product with Serializable

   

   Compiles code using Twitter's Eval class from util-eval, wrapping the attempt in a Try.

   Compiles code using Twitter's Eval class from util-eval, wrapping the attempt in a Try.

   NOTE: while thread local is a good idea for multi-threading purposes (creates one compiler per thread), one needs to be careful about the number of threads interacting with the compiler. This is true for two reasons: 1 Creation time for compiler instance takes a while. 1 compiler instances are big (translation, many threads + thread local == java.lang.OutOfMemoryError).

   Because the critical sections of the compile function of the StringCompiler.apply(*,*,*) function called by Eval.applyProcessed(*,*,*) are synchronized, we shouldn't need to worry about thread-safety. For more information, see Eval on github.

   threadingModel

   a threading model used for compilation.

   classCacheDir

   Directory where generated class files should be stored.

   imports

   import statements.

   Annotations

   @throws( ... )