How to use

rollNextFile

method

in

org.apache.rocketmq.store.CommitLog

public long getMinOffset() {
  MappedFile mappedFile = this.mappedFileQueue.getFirstMappedFile();
  if (mappedFile != null) {
    if (mappedFile.isAvailable()) {
      return mappedFile.getFileFromOffset();
    } else {
      return this.rollNextFile(mappedFile.getFileFromOffset());
    }
  }
  return -1;
}

nextPhyFileStartOffset = this.commitLog.rollNextFile(offsetPy);
continue;

this.reputFromOffset = DefaultMessageStore.this.commitLog.rollNextFile(this.reputFromOffset);
readSize = result.getSize();

public long getMinOffset() {
  MappedFile mappedFile = this.mappedFileQueue.getFirstMappedFile();
  if (mappedFile != null) {
    if (mappedFile.isAvailable()) {
      return mappedFile.getFileFromOffset();
    } else {
      return this.rollNextFile(mappedFile.getFileFromOffset());
    }
  }
  return -1;
}

nextPhyFileStartOffset = this.commitLog.rollNextFile(offsetPy);
continue;

this.reputFromOffset = DefaultMessageStore.this.commitLog.rollNextFile(this.reputFromOffset);
readSize = result.getSize();

public long getMinOffset() {
  MappedFile mappedFile = this.mappedFileQueue.getFirstMappedFile();
  if (mappedFile != null) {
    if (mappedFile.isAvailable()) {
      return mappedFile.getFileFromOffset();
    } else {
      return this.rollNextFile(mappedFile.getFileFromOffset());
    }
  }
  return -1;
}

nextPhyFileStartOffset = this.commitLog.rollNextFile(offsetPy);
continue;

this.reputFromOffset = DefaultMessageStore.this.commitLog.rollNextFile(this.reputFromOffset);
readSize = result.getSize();