Module openj9.traceformat
Package com.ibm.jvm.format

Class TraceFileHeader

java.lang.Object
com.ibm.jvm.format.TraceFileHeader
All Implemented Interfaces:
TraceFileHeader
public final class TraceFileHeader extends Object implements TraceFileHeader
Encapsulates the header for a trace file.

  • Field Details

  • Constructor Details

  • Method Details

    • processTraceBufferHeaders

      protected final void processTraceBufferHeaders() throws IOException
      Throws:
      IOException

    • summarize

      protected final void summarize(BufferedWriter out) throws IOException
      Throws:
      IOException

    • getLength

      protected final long getLength()
      returns the length of this file header
      Returns:
      a long

    • getBufferSize

      protected final int getBufferSize()
      returns the size of the buffers in the associated trace file
      Returns:
      an int

    • formatFileName

      protected final String formatFileName()

    • getVMLevel

      protected final String getVMLevel()

    • getNextFormatFileName

      protected final String getNextFormatFileName(String previous)

    • isUTE

      protected static final boolean isUTE()
      returns true if a UTE trace file is being processed
      Returns:
      a boolean

    • getTraceDataStart

      public final long getTraceDataStart()

    • getVMVersion

      public String getVMVersion()
      Specified by:
      getVMVersion in interface TraceFileHeader
      Returns:
      a String representation of the JVM that produced the current TraceFile, null if no valid data.

    • getVMStartUpParameters

      public String[] getVMStartUpParameters()
      Specified by:
      getVMStartUpParameters in interface TraceFileHeader
      Returns:
      a String array representation of the startup parameters that were used to start the JVM that produced the current TraceFile, null if no valid data.

    • getTraceParameters

      public String[] getTraceParameters()
      Specified by:
      getTraceParameters in interface TraceFileHeader
      Returns:
      a String array representation of the Trace startup parameters that were used to start the JVM that produced the current TraceFile, null if no valid data.

    • getSysProcessorInfo

      public String[] getSysProcessorInfo()
      Specified by:
      getSysProcessorInfo in interface TraceFileHeader
      Returns:
      a String array representation of the system on which the JVM that produced the current TraceFile was run, null if no valid data.

    • getJVMStartedMillis

      public long getJVMStartedMillis()
      Specified by:
      getJVMStartedMillis in interface TraceFileHeader
      Returns:
      the millisecond time at which the JVM that produced the current TraceFile was started. Returns -1 if no valid data.

    • getLastBufferWriteMillis

      public long getLastBufferWriteMillis()
      Specified by:
      getLastBufferWriteMillis in interface TraceFileHeader
      Returns:
      the millisecond time at which the JVM that produced the current TraceFile wrote its most recent TracePoint before the production of the current TraceFile. Returns -1 if no valid data.

    • getFirstTracePointMillis

      public long getFirstTracePointMillis()
      Specified by:
      getFirstTracePointMillis in interface TraceFileHeader
      Returns:
      the millisecond time of the first TracePoint in the current TraceFile. This may not be the first TracePoint that the JVM produced. Returns -1 if no valid data.

    • getLastTracePointMillis

      public long getLastTracePointMillis()
      Specified by:
      getLastTracePointMillis in interface TraceFileHeader
      Returns:
      the millisecond time of the last TracePoint in the current TraceFile. This may not be the last TracePoint that the JVM produced. Returns -1 if no valid data.