List of usage examples for com.amazonaws.services.dynamodbv2.document Page iterator
@Override public final Iterator<T> iterator()
From source file:ws.salient.aws.dynamodb.DynamoDBStore.java
License:Apache License
public Session get(Command command, KnowledgeRepository repository, Properties properties, Injector parentInjector, Sessions sessions, QuerySpec sessionQuery) { String sessionId = command.getSessionId(); String accountId = command.getAccountId(); SecretKeySpec secretKey;// ww w . j a v a2 s . c o m ByteBuffer encryptedKey; Session session = new Session(sessionId); Page<Item, QueryOutcome> page = dynamodb.getTable("SalientSession").query(sessionQuery).firstPage(); if (page != null && page.size() > 0) { try { Item result = page.iterator().next(); encryptedKey = ByteBuffer.wrap((byte[]) result.getMap("secretKey").get("encrypted")); if (encryptedKey != null) { DecryptResult decrypt = kms.decrypt(new DecryptRequest() .addEncryptionContextEntry("accountId", accountId) .addEncryptionContextEntry("sessionId", sessionId).withCiphertextBlob(encryptedKey)); byte[] key = decrypt.getPlaintext().array(); secretKey = new SecretKeySpec(key, (String) result.getMap("secretKey").get("algorithm")); } else { secretKey = null; } result = decrypt(result, secretKey, "properties", "session"); properties = json.readValue(result.getBinary("properties"), Properties.class); String knowledgeBaseId = result.getString("knowledgeBaseId"); KnowledgeBase knowledgeBase = repository.getKnowledgeBase(knowledgeBaseId); String timestamp = result.getString("timestamp"); session.init(knowledgeBase, properties, parentInjector, Instant.parse(timestamp), result.getBinary("session"), sessions); int processCount = session.getProcessCount(); List<Item> eventItems = new LinkedList(); ItemCollection<QueryOutcome> query = dynamodb.getTable("SalientSessionEvent") .query(new QuerySpec().withConsistentRead(true).withHashKey("sessionId", sessionId) .withRangeKeyCondition(new RangeKeyCondition("timestamp").gt(timestamp))); query.pages().forEach((eventPage) -> { eventPage.forEach((eventItem) -> { eventItems.add(eventItem); }); }); List<Command> commands = new LinkedList(); eventItems.forEach((eventItem) -> { try { eventItem = decrypt(eventItem, secretKey, "command"); byte[] value = eventItem.getBinary("command"); ObjectInputStream objectIn = new ObjectInputStream(new ByteArrayInputStream(value)) { protected Class<?> resolveClass(ObjectStreamClass desc) throws IOException, ClassNotFoundException { return session.getKnowledgeBase().getContainer().getClassLoader() .loadClass(desc.getName()); } }; Command event = (Command) objectIn.readObject(); if (event instanceof WorkItem) { session.getWorkItemHandlers().forEach((handler) -> { handler.getCompletedWorkItemIds().add(((WorkItem) event).getWorkItemId()); }); } commands.add(event); } catch (ClassNotFoundException | IOException ex) { throw new RuntimeException(ex); } }); commands.forEach((event) -> { session.accept(event); }); session.getWorkItemHandlers().forEach((handler) -> { handler.getCompletedWorkItemIds().clear(); }); } catch (IOException ex) { throw new RuntimeException(ex); } } else { GenerateDataKeyResult dataKey = generateEncryptionKey(accountId, sessionId); byte[] key = dataKey.getPlaintext().array(); secretKey = new SecretKeySpec(key, "AES"); encryptedKey = dataKey.getCiphertextBlob(); KnowledgeBase knowledgeBase = repository.getKnowledgeBase(command.getKnowledgeBaseId()); session.init(knowledgeBase, properties, parentInjector, command.getTimestamp(), sessions); } session.setEncryptedKey(encryptedKey); session.setSecretKey(secretKey); return session; }