@Override
public void add(HTableDescriptor htd) throws IOException {
if (Bytes.equals(HConstants.ROOT_TABLE_NAME, htd.getName())) {
throw new NotImplementedException();
}
if (Bytes.equals(HConstants.META_TABLE_NAME, htd.getName())) {
throw new NotImplementedException();
}
if (HConstants.HBASE_NON_USER_TABLE_DIRS.contains(htd.getNameAsString())) {
throw new NotImplementedException();
}
if (!this.fsreadonly) updateHTableDescriptor(this.fs, this.rootdir, htd);
long modtime = getTableInfoModtime(this.fs, this.rootdir, htd.getNameAsString());
this.cache.put(htd.getNameAsString(), new TableDescriptorModtime(modtime, htd));
}
/* (non-Javadoc)
* @see org.apache.hadoop.hbase.TableDescriptors#getTableDescriptor(byte[])
*/
@Override
public HTableDescriptor get(final String tablename) throws IOException {
invocations++;
if (HTableDescriptor.ROOT_TABLEDESC.getNameAsString().equals(tablename)) {
cachehits++;
return HTableDescriptor.ROOT_TABLEDESC;
}
if (HTableDescriptor.META_TABLEDESC.getNameAsString().equals(tablename)) {
cachehits++;
return HTableDescriptor.META_TABLEDESC;
}
// .META. and -ROOT- is already handled. If some one tries to get the descriptor for
// .logs, .oldlogs or .corrupt throw an exception.
if (HConstants.HBASE_NON_USER_TABLE_DIRS.contains(tablename)) {
throw new IOException("No descriptor found for table = " + tablename);
}
// Look in cache of descriptors.
TableDescriptorModtime cachedtdm = this.cache.get(tablename);
if (cachedtdm != null) {
// Check mod time has not changed (this is trip to NN).
if (getTableInfoModtime(this.fs, this.rootdir, tablename) <= cachedtdm.getModtime()) {
cachehits++;
return cachedtdm.getTableDescriptor();
}
}
TableDescriptorModtime tdmt = null;
try {
tdmt = getTableDescriptorModtime(this.fs, this.rootdir, tablename);
} catch (NullPointerException e) {
LOG.debug("Exception during readTableDecriptor. Current table name = " + tablename, e);
} catch (IOException ioe) {
LOG.debug("Exception during readTableDecriptor. Current table name = " + tablename, ioe);
}
if (tdmt == null) {
LOG.warn(
"The following folder is in HBase's root directory and "
+ "doesn't contain a table descriptor, "
+ "do consider deleting it: "
+ tablename);
} else {
this.cache.put(tablename, tdmt);
}
return tdmt == null ? null : tdmt.getTableDescriptor();
}