Class HeapdumpReader

java.lang.Object
com.ibm.dtfj.phd.parser.Base
com.ibm.dtfj.phd.parser.HeapdumpReader
public class HeapdumpReader extends Base
This class parses a PHD format heapdump file. To use it, first create the object (see HeapdumpReader(String)) passing the file name and then parse it (see parse(PortableHeapDumpListener)) passing it an object that obeys the PortableHeapDumpListener interface.

  • Constructor Details

    • HeapdumpReader

      public HeapdumpReader(File file, PHDImage image) throws IOException
      Create a new HeapdumpReader object from the given file. The file must be in Phd format. Image must be supplied to allow us to clean up streams when it is closed.
      Throws:
      IOException

    • HeapdumpReader

      public HeapdumpReader(ImageInputStream stream, PHDImage image) throws IOException
      Throws:
      IOException

    • HeapdumpReader

      protected HeapdumpReader(ImageInputStream stream) throws IOException
      Create a new HeapdumpReader object from the given stream. The file must be in Phd format.
      Throws:
      IOException

    • HeapdumpReader

      protected HeapdumpReader(String filename) throws IOException
      Create a new HeapdumpReader object from the given file. The file must be in Phd format.
      Throws:
      IOException

  • Method Details

    • full_version

      public String full_version()
      Returns the full version for the JVM that created this heapdump.

    • version

      public int version()
      Returns the Phd version number. Recognized values are 4 and 5.

    • is64Bit

      public boolean is64Bit()
      Returns true if this is a 64-bit heap dump.

    • isJ9

      public boolean isJ9()
      Returns true if this is a J9 heap dump.

    • allObjectsHashed

      public boolean allObjectsHashed()
      Returns true all objects in this heap dump will have hashcodes set, regardless of the flags on the record.

    • totalObjects

      public int totalObjects()
      Returns the total number of objects in the dump.

    • totalRefs

      public int totalRefs()
      Returns the total number of references in the dump.

    • exitParse

      public void exitParse()

    • parse

      public boolean parse(PortableHeapDumpListener listener) throws Exception
      Parse the heapdump. This uses callbacks via the PortableHeapDumpListener interface. Any exceptions that the listener raises are propagated back.
      Returns:
      true if there is more data to parse
      Throws:
      Exception

    • close

      public void close()

    • releaseResources

      public void releaseResources()

    • main

      public static void main(String[] args) throws IOException
      This method just prints out the following info from the header:
      • is64Bit
      • phd version
      • full version
      • total objects
      • total refs
      Throws:
      IOException