/**
* beginStep() and the endStep() calls do not match the boundary of the
* sections. This is because that the current implementation only allows
* a particular step to be started for once.
*/
Step currentStep = null;
for (FileSummary.Section s : sections) {
channel.position(s.getOffset());
InputStream in = new BufferedInputStream(new LimitInputStream(fin,
s.getLength()));
in = FSImageUtil.wrapInputStreamForCompression(conf,
summary.getCodec(), in);
String n = s.getName();
switch (SectionName.fromString(n)) {
case NS_INFO:
loadNameSystemSection(in);
break;
case STRING_TABLE:
loadStringTableSection(in);
break;
case INODE: {
currentStep = new Step(StepType.INODES);
prog.beginStep(Phase.LOADING_FSIMAGE, currentStep);
inodeLoader.loadINodeSection(in);
}
break;
case INODE_REFERENCE:
snapshotLoader.loadINodeReferenceSection(in);
break;
case INODE_DIR:
inodeLoader.loadINodeDirectorySection(in);
break;
case FILES_UNDERCONSTRUCTION:
inodeLoader.loadFilesUnderConstructionSection(in);
break;
case SNAPSHOT:
snapshotLoader.loadSnapshotSection(in);
break;
case SNAPSHOT_DIFF:
snapshotLoader.loadSnapshotDiffSection(in);
break;
case SECRET_MANAGER: {
prog.endStep(Phase.LOADING_FSIMAGE, currentStep);
Step step = new Step(StepType.DELEGATION_TOKENS);
prog.beginStep(Phase.LOADING_FSIMAGE, step);
loadSecretManagerSection(in);
prog.endStep(Phase.LOADING_FSIMAGE, step);
}
break;
case CACHE_MANAGER: {
Step step = new Step(StepType.CACHE_POOLS);
prog.beginStep(Phase.LOADING_FSIMAGE, step);
loadCacheManagerSection(in);
prog.endStep(Phase.LOADING_FSIMAGE, step);
}
break;