http://metrics.dropwizard.io/metrics-core: Metrics is a Java library which gives you unparalleled insight into what your code does in production. Metrics provides a powerful toolkit of ways to measure the behavior of critical components in your production environment.
  • Coda Hale
  • Ryan Tenney
  • Artem Prigoda 
public class com.codahale.metrics.FixedNameCsvFileProvider implements com.codahale.metrics.CsvFileProvider
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: com.codahale.metrics.FixedNameCsvFileProvider
  super_class: java.lang.Object
{
  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.codahale.metrics.FixedNameCsvFileProvider this
         0: .line 9
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.codahale.metrics.FixedNameCsvFileProvider this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/codahale/metrics/FixedNameCsvFileProvider;

  public java.io.File getFile(java.io.File, java.lang.String);
    descriptor: (Ljava/io/File;Ljava/lang/String;)Ljava/io/File;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=7, locals=3, args_size=3
        start local 0 // com.codahale.metrics.FixedNameCsvFileProvider this
        start local 1 // java.io.File directory
        start local 2 // java.lang.String metricName
         0: .line 13
            new java.io.File
            dup
            aload 1 /* directory */
            new java.lang.StringBuilder
            dup
            aload 0 /* this */
            aload 2 /* metricName */
            invokevirtual com.codahale.metrics.FixedNameCsvFileProvider.sanitize:(Ljava/lang/String;)Ljava/lang/String;
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            ldc ".csv"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.io.File.<init>:(Ljava/io/File;Ljava/lang/String;)V
            areturn
        end local 2 // java.lang.String metricName
        end local 1 // java.io.File directory
        end local 0 // com.codahale.metrics.FixedNameCsvFileProvider this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    1     0        this  Lcom/codahale/metrics/FixedNameCsvFileProvider;
            0    1     1   directory  Ljava/io/File;
            0    1     2  metricName  Ljava/lang/String;
    MethodParameters:
            Name  Flags
      directory   
      metricName  

  protected java.lang.String sanitize(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/lang/String;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // com.codahale.metrics.FixedNameCsvFileProvider this
        start local 1 // java.lang.String metricName
         0: .line 19
            aload 1 /* metricName */
            ldc "^/"
            ldc ""
            invokevirtual java.lang.String.replaceFirst:(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
            ldc "/"
            ldc "."
            invokevirtual java.lang.String.replaceAll:(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
            areturn
        end local 1 // java.lang.String metricName
        end local 0 // com.codahale.metrics.FixedNameCsvFileProvider this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    1     0        this  Lcom/codahale/metrics/FixedNameCsvFileProvider;
            0    1     1  metricName  Ljava/lang/String;
    MethodParameters:
            Name  Flags
      metricName  
}
SourceFile: "FixedNameCsvFileProvider.java"