Track the Number of Messages

[kev1n80]

Implementation

• Create new constructor for DiskQueue that uses the new Disk Size Limit feature.
• Implement the handling of Depth for the Disk Size Limit feature.
• If using the Disk Size Limit feature:
  • Track the number of messages in the write file and write it to the end of the file
  • Track the number of messages in the read file that have been read
  • Write the writeMessages and readMessages to the MetaData

Testing

• test that write and read messages increment normally after putting and/or getting data
• test that write position and messages reset when a new file is created
• test that read position and messages reset when a file is completely read

Next Steps

• Calculate the total disk space used by tracking writeBytes (the number of bytes written that have not been deleted) and readBytes (the number of bytes to be deleted)

Note

This pr will only handle the tracking of writeMessages and readMessages. The implementation of making space when we surpass the diskSizeLimit will come later.

[leonzz]

I guess the other parts (e.g. the one documented in Next Steps) will come in later PRs? if so it might worth updating this PR title to reflect the change. looks like it's mainly about counting the number of messages per file.

[CatherineF-dev]

Do we need to update writeMessages and readMessages in handleReadError now?

[kev1n80]

Do we need to update writeMessages and readMessages in handleReadError now?

Yes!!!! Nice catch!