| package net.onrc.onos.core.intent.runtime; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.Arrays; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| import net.onrc.onos.core.datastore.DataStoreClient; |
| import net.onrc.onos.core.datastore.IKVTable; |
| import net.onrc.onos.core.datastore.ObjectExistsException; |
| import net.onrc.onos.core.intent.IntentOperationList; |
| import net.onrc.onos.core.registry.IControllerRegistryService; |
| import net.onrc.onos.core.util.IdBlock; |
| import net.onrc.onos.core.util.serializers.KryoFactory; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.esotericsoftware.kryo.Kryo; |
| import com.esotericsoftware.kryo.io.Output; |
| |
| /** |
| * The module used by PathCalcRuntimeModule class. |
| * <p> |
| * It persists intent operations into persistent storage. |
| */ |
| public class PersistIntent { |
| private static final Logger log = LoggerFactory.getLogger(PersistIntent.class); |
| private long range = 10000L; |
| private final IControllerRegistryService controllerRegistry; |
| private static final String INTENT_JOURNAL = "G:IntentJournal"; |
| private static final int VALUE_STORE_LIMIT = 1024 * 1024; |
| private IKVTable table; |
| private Kryo kryo; |
| private ByteArrayOutputStream stream; |
| private Output output = null; |
| private AtomicLong nextId = null; |
| private long rangeEnd; |
| private IdBlock idBlock = null; |
| |
| /** |
| * Constructor. |
| * |
| * @param controllerRegistry the Registry Service to use. |
| */ |
| public PersistIntent(final IControllerRegistryService controllerRegistry) { |
| this.controllerRegistry = controllerRegistry; |
| table = DataStoreClient.getClient().getTable(INTENT_JOURNAL); |
| stream = new ByteArrayOutputStream(1024); |
| output = new Output(stream); |
| // FIXME Using KryoFactory only to register classes and not using the pool. |
| kryo = new KryoFactory(1).newKryo(); |
| } |
| |
| private long getNextBlock() { |
| // XXX This method is not thread safe, may lose allocated IdBlock |
| idBlock = controllerRegistry.allocateUniqueIdBlock(range); |
| nextId = new AtomicLong(idBlock.getStart()); |
| rangeEnd = idBlock.getEnd(); |
| return nextId.get(); |
| } |
| |
| /** |
| * Provides the unique key for persisting. |
| * <p> |
| * This key is necessary for persistIfLeader() method. |
| * |
| * @return a key for persisting. |
| */ |
| public long getKey() { |
| long key; |
| if (idBlock == null) { |
| key = getNextBlock(); |
| } else { |
| key = nextId.incrementAndGet(); |
| if (key >= rangeEnd) { |
| key = getNextBlock(); |
| } |
| } |
| return key; |
| } |
| |
| /** |
| * Persist intent operations into persistent storage only if this instance was a leader. |
| * |
| * @param key a unique key |
| * @param operations intent operations |
| * @return true if succeeded, otherwise false. |
| */ |
| public boolean persistIfLeader(long key, IntentOperationList operations) { |
| boolean leader = true; |
| boolean ret = false; |
| long keyValue = key; |
| // TODO call controllerRegistry.isClusterLeader() |
| if (leader) { |
| try { |
| // reserve key 10 entries for multi-write if size over 1MB |
| keyValue *= 10; |
| kryo.writeObject(output, operations); |
| output.close(); |
| ByteBuffer keyBytes = ByteBuffer.allocate(8).putLong(keyValue); |
| byte[] buffer = stream.toByteArray(); |
| int total = buffer.length; |
| if ((total >= VALUE_STORE_LIMIT)) { |
| int writeCount = total / VALUE_STORE_LIMIT; |
| int remainder = total % VALUE_STORE_LIMIT; |
| int upperIndex = 0; |
| for (int i = 0; i < writeCount; i++, keyValue++) { |
| keyBytes.clear(); |
| keyBytes.putLong(keyValue); |
| keyBytes.flip(); |
| upperIndex = (i * VALUE_STORE_LIMIT + VALUE_STORE_LIMIT) - 1; |
| log.debug("writing using indexes {}:{}", (i * VALUE_STORE_LIMIT), upperIndex); |
| table.create(keyBytes.array(), Arrays.copyOfRange(buffer, i * VALUE_STORE_LIMIT, upperIndex)); |
| } |
| if (remainder > 0) { |
| keyBytes.clear(); |
| keyBytes.putLong(keyValue); |
| keyBytes.flip(); |
| log.debug("writing using indexes {}:{}", upperIndex, total); |
| table.create(keyBytes.array(), Arrays.copyOfRange(buffer, upperIndex + 1, total - 1)); |
| } |
| } else { |
| keyBytes.flip(); |
| table.create(keyBytes.array(), buffer); |
| } |
| log.debug("key is {} value length is {}", keyValue, buffer.length); |
| stream.reset(); |
| stream.close(); |
| log.debug("persist operations to ramcloud size of operations: {}", operations.size()); |
| ret = true; |
| } catch (ObjectExistsException ex) { |
| log.warn("Failed to store intent journal with key " + keyValue); |
| } catch (IOException ex) { |
| log.error("Failed to close the stream"); |
| } |
| } |
| return ret; |
| } |
| } |