import org.apache.hadoop.hdfs.server.namenode.startupprogress.StartupProgress; //导入依赖的package包/类
/**
 * Private helper methods to save delegation keys and tokens in fsimage
 */
private synchronized void saveCurrentTokens(DataOutputStream out,
    String sdPath) throws IOException {
  StartupProgress prog = NameNode.getStartupProgress();
  Step step = new Step(StepType.DELEGATION_TOKENS, sdPath);
  prog.beginStep(Phase.SAVING_CHECKPOINT, step);
  prog.setTotal(Phase.SAVING_CHECKPOINT, step, currentTokens.size());
  Counter counter = prog.getCounter(Phase.SAVING_CHECKPOINT, step);
  out.writeInt(currentTokens.size());
  Iterator<DelegationTokenIdentifier> iter = currentTokens.keySet()
      .iterator();
  while (iter.hasNext()) {
    DelegationTokenIdentifier id = iter.next();
    id.write(out);
    DelegationTokenInformation info = currentTokens.get(id);
    out.writeLong(info.getRenewDate());
    counter.increment();
  }
  prog.endStep(Phase.SAVING_CHECKPOINT, step);
}
 

import org.apache.hadoop.hdfs.server.namenode.startupprogress.StartupProgress; //导入依赖的package包/类
private synchronized void saveAllKeys(DataOutputStream out, String sdPath)
    throws IOException {
  StartupProgress prog = NameNode.getStartupProgress();
  Step step = new Step(StepType.DELEGATION_KEYS, sdPath);
  prog.beginStep(Phase.SAVING_CHECKPOINT, step);
  prog.setTotal(Phase.SAVING_CHECKPOINT, step, currentTokens.size());
  Counter counter = prog.getCounter(Phase.SAVING_CHECKPOINT, step);
  out.writeInt(allKeys.size());
  Iterator<Integer> iter = allKeys.keySet().iterator();
  while (iter.hasNext()) {
    Integer key = iter.next();
    allKeys.get(key).write(out);
    counter.increment();
  }
  prog.endStep(Phase.SAVING_CHECKPOINT, step);
}
 

import org.apache.hadoop.hdfs.server.namenode.startupprogress.StartupProgress; //导入依赖的package包/类
/**
 * Private helper methods to load Delegation tokens from fsimage
 */
private synchronized void loadCurrentTokens(DataInput in)
    throws IOException {
  StartupProgress prog = NameNode.getStartupProgress();
  Step step = new Step(StepType.DELEGATION_TOKENS);
  prog.beginStep(Phase.LOADING_FSIMAGE, step);
  int numberOfTokens = in.readInt();
  prog.setTotal(Phase.LOADING_FSIMAGE, step, numberOfTokens);
  Counter counter = prog.getCounter(Phase.LOADING_FSIMAGE, step);
  for (int i = 0; i < numberOfTokens; i++) {
    DelegationTokenIdentifier id = new DelegationTokenIdentifier();
    id.readFields(in);
    long expiryTime = in.readLong();
    addPersistedDelegationToken(id, expiryTime);
    counter.increment();
  }
  prog.endStep(Phase.LOADING_FSIMAGE, step);
}
 

import org.apache.hadoop.hdfs.server.namenode.startupprogress.StartupProgress; //导入依赖的package包/类
/**
 * Private helper method to load delegation keys from fsimage.
 * @throws IOException on error
 */
private synchronized void loadAllKeys(DataInput in) throws IOException {
  StartupProgress prog = NameNode.getStartupProgress();
  Step step = new Step(StepType.DELEGATION_KEYS);
  prog.beginStep(Phase.LOADING_FSIMAGE, step);
  int numberOfKeys = in.readInt();
  prog.setTotal(Phase.LOADING_FSIMAGE, step, numberOfKeys);
  Counter counter = prog.getCounter(Phase.LOADING_FSIMAGE, step);
  for (int i = 0; i < numberOfKeys; i++) {
    DelegationKey value = new DelegationKey();
    value.readFields(in);
    addKey(value);
    counter.increment();
  }
  prog.endStep(Phase.LOADING_FSIMAGE, step);
}
 

import org.apache.hadoop.hdfs.server.namenode.startupprogress.StartupProgress; //导入依赖的package包/类
/**
 * Load an edit log, and apply the changes to the in-memory structure
 * This is where we apply edits that we've been writing to disk all
 * along.
 */
long loadFSEdits(EditLogInputStream edits, long expectedStartingTxId,
    StartupOption startOpt, MetaRecoveryContext recovery) throws IOException {
  StartupProgress prog = NameNode.getStartupProgress();
  Step step = createStartupProgressStep(edits);
  prog.beginStep(Phase.LOADING_EDITS, step);
  fsNamesys.writeLock();
  try {
    long startTime = monotonicNow();
    FSImage.LOG.info("Start loading edits file " + edits.getName());
    long numEdits = loadEditRecords(edits, false, expectedStartingTxId,
        startOpt, recovery);
    FSImage.LOG.info("Edits file " + edits.getName() 
        + " of size " + edits.length() + " edits # " + numEdits 
        + " loaded in " + (monotonicNow()-startTime)/1000 + " seconds");
    return numEdits;
  } finally {
    edits.close();
    fsNamesys.writeUnlock();
    prog.endStep(Phase.LOADING_EDITS, step);
  }
}
 

import org.apache.hadoop.hdfs.server.namenode.startupprogress.StartupProgress; //导入依赖的package包/类
/**
 * Increment number of safe blocks if current block has 
 * reached minimal replication.
 * @param replication current replication 
 */
private synchronized void incrementSafeBlockCount(short replication) {
  if (replication == safeReplication) {
    this.blockSafe++;

    // Report startup progress only if we haven't completed startup yet.
    StartupProgress prog = NameNode.getStartupProgress();
    if (prog.getStatus(Phase.SAFEMODE) != Status.COMPLETE) {
      if (this.awaitingReportedBlocksCounter == null) {
        this.awaitingReportedBlocksCounter = prog.getCounter(Phase.SAFEMODE,
          STEP_AWAITING_REPORTED_BLOCKS);
      }
      this.awaitingReportedBlocksCounter.increment();
    }

    checkMode();
  }
}
 

import org.apache.hadoop.hdfs.server.namenode.startupprogress.StartupProgress; //导入依赖的package包/类
/**
 * Load cache directives from the fsimage
 */
private void loadDirectives(DataInput in) throws IOException {
  StartupProgress prog = NameNode.getStartupProgress();
  Step step = new Step(StepType.CACHE_ENTRIES);
  prog.beginStep(Phase.LOADING_FSIMAGE, step);
  int numDirectives = in.readInt();
  prog.setTotal(Phase.LOADING_FSIMAGE, step, numDirectives);
  Counter counter = prog.getCounter(Phase.LOADING_FSIMAGE, step);
  for (int i = 0; i < numDirectives; i++) {
    CacheDirectiveInfo info = FSImageSerialization.readCacheDirectiveInfo(in);
    // Get pool reference by looking it up in the map
    final String poolName = info.getPool();
    CacheDirective directive =
        new CacheDirective(info.getId(), info.getPath().toUri().getPath(),
            info.getReplication(), info.getExpiration().getAbsoluteMillis());
    addCacheDirective(poolName, directive);
    counter.increment();
  }
  prog.endStep(Phase.LOADING_FSIMAGE, step);
}
 

import org.apache.hadoop.hdfs.server.namenode.startupprogress.StartupProgress; //导入依赖的package包/类
@Before
public void setUp() throws Exception {
  startupProgress = new StartupProgress();
  ServletContext context = mock(ServletContext.class);
  when(context.getAttribute(NameNodeHttpServer.STARTUP_PROGRESS_ATTRIBUTE_KEY))
    .thenReturn(startupProgress);
  servlet = mock(StartupProgressServlet.class);
  when(servlet.getServletContext()).thenReturn(context);
  doCallRealMethod().when(servlet).doGet(any(HttpServletRequest.class),
    any(HttpServletResponse.class));
  req = mock(HttpServletRequest.class);
  respOut = new ByteArrayOutputStream();
  PrintWriter writer = new PrintWriter(respOut);
  resp = mock(HttpServletResponse.class);
  when(resp.getWriter()).thenReturn(writer);
}
 

import org.apache.hadoop.hdfs.server.namenode.startupprogress.StartupProgress; //导入依赖的package包/类
private void loadSecretManagerSection(InputStream in, StartupProgress prog,
    Step currentStep) throws IOException {
  SecretManagerSection s = SecretManagerSection.parseDelimitedFrom(in);
  int numKeys = s.getNumKeys(), numTokens = s.getNumTokens();
  ArrayList<SecretManagerSection.DelegationKey> keys = Lists
      .newArrayListWithCapacity(numKeys);
  ArrayList<SecretManagerSection.PersistToken> tokens = Lists
      .newArrayListWithCapacity(numTokens);

  for (int i = 0; i < numKeys; ++i)
    keys.add(SecretManagerSection.DelegationKey.parseDelimitedFrom(in));

  prog.setTotal(Phase.LOADING_FSIMAGE, currentStep, numTokens);
  Counter counter = prog.getCounter(Phase.LOADING_FSIMAGE, currentStep);
  for (int i = 0; i < numTokens; ++i) {
    tokens.add(SecretManagerSection.PersistToken.parseDelimitedFrom(in));
    counter.increment();
  }

  fsn.loadSecretManagerState(s, keys, tokens);
}
 

import org.apache.hadoop.hdfs.server.namenode.startupprogress.StartupProgress; //导入依赖的package包/类
private void loadCacheManagerSection(InputStream in, StartupProgress prog,
    Step currentStep) throws IOException {
  CacheManagerSection s = CacheManagerSection.parseDelimitedFrom(in);
  int numPools = s.getNumPools();
  ArrayList<CachePoolInfoProto> pools = Lists
      .newArrayListWithCapacity(numPools);
  ArrayList<CacheDirectiveInfoProto> directives = Lists
      .newArrayListWithCapacity(s.getNumDirectives());
  prog.setTotal(Phase.LOADING_FSIMAGE, currentStep, numPools);
  Counter counter = prog.getCounter(Phase.LOADING_FSIMAGE, currentStep);
  for (int i = 0; i < numPools; ++i) {
    pools.add(CachePoolInfoProto.parseDelimitedFrom(in));
    counter.increment();
  }
  for (int i = 0; i < s.getNumDirectives(); ++i)
    directives.add(CacheDirectiveInfoProto.parseDelimitedFrom(in));
  fsn.getCacheManager().loadState(
      new CacheManager.PersistState(s, pools, directives));
}
 

import org.apache.hadoop.hdfs.server.namenode.startupprogress.StartupProgress; //导入依赖的package包/类
void loadINodeSection(InputStream in, StartupProgress prog,
    Step currentStep) throws IOException {
  INodeSection s = INodeSection.parseDelimitedFrom(in);
  fsn.dir.resetLastInodeId(s.getLastInodeId());
  long numInodes = s.getNumInodes();
  LOG.info("Loading " + numInodes + " INodes.");
  prog.setTotal(Phase.LOADING_FSIMAGE, currentStep, numInodes);
  Counter counter = prog.getCounter(Phase.LOADING_FSIMAGE, currentStep);
  for (int i = 0; i < numInodes; ++i) {
    INodeSection.INode p = INodeSection.INode.parseDelimitedFrom(in);
    if (p.getId() == INodeId.ROOT_INODE_ID) {
      loadRootINode(p);
    } else {
      INode n = loadINode(p);
      dir.addToInodeMap(n);
    }
    counter.increment();
  }
}
 

import org.apache.hadoop.hdfs.server.namenode.startupprogress.StartupProgress; //导入依赖的package包/类
/**
 * Load an edit log, and apply the changes to the in-memory structure
 * This is where we apply edits that we've been writing to disk all
 * along.
 */
long loadFSEdits(EditLogInputStream edits, long expectedStartingTxId,
    StartupOption startOpt, MetaRecoveryContext recovery) throws IOException {
  StartupProgress prog = NameNode.getStartupProgress();
  Step step = createStartupProgressStep(edits);
  prog.beginStep(Phase.LOADING_EDITS, step);
  fsNamesys.writeLock();
  try {
    long startTime = now();
    FSImage.LOG.info("Start loading edits file " + edits.getName());
    long numEdits = loadEditRecords(edits, false, expectedStartingTxId,
        startOpt, recovery);
    FSImage.LOG.info("Edits file " + edits.getName() 
        + " of size " + edits.length() + " edits # " + numEdits 
        + " loaded in " + (now()-startTime)/1000 + " seconds");
    return numEdits;
  } finally {
    edits.close();
    fsNamesys.writeUnlock();
    prog.endStep(Phase.LOADING_EDITS, step);
  }
}
 

import org.apache.hadoop.hdfs.server.namenode.startupprogress.StartupProgress; //导入依赖的package包/类
@Test
public void testGenerateStartupProgress() throws Exception {
  cluster.waitClusterUp();
  NamenodeJspHelper.HealthJsp jsp = new NamenodeJspHelper.HealthJsp();
  StartupProgress prog = NameNode.getStartupProgress();
  JspWriter out = mock(JspWriter.class);
  jsp.generateStartupProgress(out, prog);
  ArgumentCaptor<String> captor = ArgumentCaptor.forClass(String.class);
  verify(out, atLeastOnce()).println(captor.capture());
  List<String> contents = captor.getAllValues();

  // Verify 100% overall completion and all phases mentioned in output.
  Assert.assertTrue(containsMatch(contents, "Elapsed Time\\:"));
  Assert.assertTrue(containsMatch(contents, "Percent Complete\\:.*?100\\.00%"));
  Assert.assertTrue(containsMatch(contents, LOADING_FSIMAGE.getDescription()));
  Assert.assertTrue(containsMatch(contents, LOADING_EDITS.getDescription()));
  Assert.assertTrue(containsMatch(contents,
    SAVING_CHECKPOINT.getDescription()));
  Assert.assertTrue(containsMatch(contents, SAFEMODE.getDescription()));
}
 

import org.apache.hadoop.hdfs.server.namenode.startupprogress.StartupProgress; //导入依赖的package包/类
/**
 * Private helper method to load delegation keys from fsimage.
 * @param in
 * @throws IOException
 */
private synchronized void loadAllKeys(DataInput in) throws IOException {
  StartupProgress prog = NameNode.getStartupProgress();
  Step step = new Step(StepType.DELEGATION_KEYS);
  prog.beginStep(Phase.LOADING_FSIMAGE, step);
  int numberOfKeys = in.readInt();
  prog.setTotal(Phase.LOADING_FSIMAGE, step, numberOfKeys);
  Counter counter = prog.getCounter(Phase.LOADING_FSIMAGE, step);
  for (int i = 0; i < numberOfKeys; i++) {
    DelegationKey value = new DelegationKey();
    value.readFields(in);
    addKey(value);
    counter.increment();
  }
  prog.endStep(Phase.LOADING_FSIMAGE, step);
}
 

import org.apache.hadoop.hdfs.server.namenode.startupprogress.StartupProgress; //导入依赖的package包/类
/**
 * Load an edit log, and apply the changes to the in-memory structure
 * This is where we apply edits that we've been writing to disk all
 * along.
 */
long loadFSEdits(EditLogInputStream edits, long expectedStartingTxId,
    MetaRecoveryContext recovery) throws IOException {
  StartupProgress prog = NameNode.getStartupProgress();
  Step step = createStartupProgressStep(edits);
  prog.beginStep(Phase.LOADING_EDITS, step);
  fsNamesys.writeLock();
  try {
    long startTime = now();
    FSImage.LOG.info("Start loading edits file " + edits.getName());
    long numEdits = loadEditRecords(edits, false, 
                               expectedStartingTxId, recovery);
    FSImage.LOG.info("Edits file " + edits.getName() 
        + " of size " + edits.length() + " edits # " + numEdits 
        + " loaded in " + (now()-startTime)/1000 + " seconds");
    return numEdits;
  } finally {
    edits.close();
    fsNamesys.writeUnlock();
    prog.endStep(Phase.LOADING_EDITS, step);
  }
}