com.github.ferstl.jarscan.InstructionCountMojo Maven / Gradle / Ivy

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A Maven plugin that scans the project artifact and its dependencies for methods that cannot be inlined by the JIT compiler. It uses the JarScan utility from the JITWatch project to do that. See https://github.com/AdoptOpenJDK/jitwatch .

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package com.github.ferstl.jarscan;

import org.adoptopenjdk.jitwatch.jarscan.IJarScanOperation;
import org.adoptopenjdk.jitwatch.jarscan.instructioncount.InstructionCountOperation;
import org.apache.maven.plugins.annotations.LifecyclePhase;
import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.plugins.annotations.Parameter;
import org.apache.maven.plugins.annotations.ResolutionScope;

/**
 * Count occurrences of each bytecode instruction.
 *
 * @since 1.1
 */
@Mojo(
    name = "instructionCount",
    aggregator = false,
    defaultPhase = LifecyclePhase.VERIFY,
    requiresDependencyCollection = ResolutionScope.TEST,
    requiresDependencyResolution = ResolutionScope.TEST,
    requiresDirectInvocation = false,
    threadSafe = true)
public class InstructionCountMojo extends AbstractJarScanMojo {

  /**
   * Limit to top n results.
   *
   * @since 1.1
   */
  @Parameter(property = "limit", defaultValue = "0")
  private int limit;

  @Override
  protected String validateMojoParameters() {
    if (this.limit < 0) {
      return "limit must be >= 0.";
    }

    return null;
  }

  @Override
  protected IJarScanOperation createOperation() {
    return new InstructionCountOperation(this.limit);
  }

}