Example usage for org.apache.hadoop.hdfs.server.blockmanagement DatanodeStorageInfo getDatanodeDescriptor

Introduction

In this page you can find the example usage for org.apache.hadoop.hdfs.server.blockmanagement DatanodeStorageInfo getDatanodeDescriptor.

Prototype

public DatanodeDescriptor getDatanodeDescriptor() 

Source Link

Usage

From source file:io.hops.metadata.StorageMap.java

License:Apache License

/**
 * Adds or replaces storageinfo for the given sid
 *//* ww w  .j a va 2 s. co m*/
public void updateStorage(final DatanodeStorageInfo storageInfo) {
    try {
        // Allow lookup of storageId (String) <--> sid (int)
        storageIdMap.update(storageInfo);

        // Also write to the storages table (mapping DN-Sid-storagetype)
        final int sid = storageInfo.getSid();
        final String datanodeUuid = storageInfo.getDatanodeDescriptor().getDatanodeUuid();
        final int storageType = storageInfo.getStorageType().ordinal();

        // Get the list of storages we know to be on this DN
        ArrayList<Integer> sids = this.datanodeUuidToSids.get(datanodeUuid);

        if (sids == null) { // First time we see this DN
            sids = new ArrayList<Integer>();
            this.datanodeUuidToSids.put(datanodeUuid, sids);
        }

        if (!sids.contains(sid)) { // We haven't seen this sid on this DN yet
            // Add in hashmap
            sids.add(sid);

            // Persist to database
            new HopsTransactionalRequestHandler(HDFSOperationType.UPDATE_SID_MAP) {
                @Override
                public void acquireLock(TransactionLocks locks) throws IOException {
                    LockFactory lf = LockFactory.getInstance();
                    locks.add(lf.getVariableLock(Variable.Finder.StorageMap, LockType.READ_COMMITTED));
                }

                @Override
                public Object performTask() throws StorageException, IOException {
                    StorageDataAccess<Storage> da = (StorageDataAccess) HdfsStorageFactory
                            .getDataAccess(StorageDataAccess.class);
                    Storage h = da.findByPk(sid);
                    if (h == null) {
                        h = new Storage(sid, datanodeUuid, storageType);
                        da.add(h);
                    }
                    return null;
                }
            }.handle();
        }
    } catch (IOException e) {
        // TODO throw some stuff?
        e.printStackTrace();
    }

    // Allow lookup of sid (int) -> DatanodeStorageInfo
    storageInfoMap.put(storageInfo.getSid(), storageInfo);
}

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