diff options
Diffstat (limited to 'dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher')
6 files changed, 611 insertions, 0 deletions
diff --git a/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisher.java b/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisher.java new file mode 100644 index 0000000..1d37786 --- /dev/null +++ b/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisher.java @@ -0,0 +1,95 @@ +/* + * ===============================LICENSE_START====================================== + * dcae-analytics + * ================================================================================ + * Copyright © 2017 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * ============================LICENSE_END=========================================== + */ + +package org.openecomp.dcae.apod.analytics.dmaap.service.publisher; + +import org.openecomp.dcae.apod.analytics.common.exception.DCAEAnalyticsRuntimeException; +import org.openecomp.dcae.apod.analytics.dmaap.domain.config.DMaaPMRPublisherConfig; +import org.openecomp.dcae.apod.analytics.dmaap.domain.response.DMaaPMRPublisherResponse; + +import java.util.Date; +import java.util.List; + +/** + * <p> + * DMaaP MR Publisher can be used to publish messages to DMaaP MR Topics. + * <p> + * + * @author Rajiv Singla . Creation Date: 10/13/2016. + */ +public interface DMaaPMRPublisher extends AutoCloseable { + + + /** + * <p> + * Adds collection of messages to DMaaP MR Topic Publishing Queue. + * <p> + * Note: Invoking this method may or may not cause publishing immediately + * as publishing in done is batch mode by default. Parameter maxBatchSize + * in {@link DMaaPMRPublisherConfig} is used to determine max batch queue size. + * If the maxBatchSize is reached all message will be published automatically + * during subsequent call. + * </p> + * + * @param messages messages to publish to DMaaP MR Publisher + * @return response which may contain Http Response code 202 (Accepted) as publishing + * will proceed when max batch size is reached. Throws {@link DCAEAnalyticsRuntimeException} + * if publishing fails + */ + DMaaPMRPublisherResponse publish(List<String> messages); + + + /** + * <p> + * Forces publishing of messages to DMaaP MR Topic and returns {@link DMaaPMRPublisherResponse} + * which can be inspected for HTTP status code of publishing call to DMaaP MR Topic. + * </p> + * + * @param messages messages to publish to DMaaP MR Publisher + * @return DMaaP Message Router Publisher Response. Throws {@link DCAEAnalyticsRuntimeException} + * if force publishing fails + * + */ + DMaaPMRPublisherResponse forcePublish(List<String> messages); + + + /** + * <p> + * Forces publishing of messages in Publisher queue to DMaaP MR Topic and returns + * {@link DMaaPMRPublisherResponse}.If there are no messages were in the queue to + * be flushed response code 304 (Not Modified) will be returned + * </p> + * + * @return DMaaP Message Router Publisher Response + */ + DMaaPMRPublisherResponse flush(); + + + /** + * <p> + * Returns the creation time when Publisher instance was created. + * <p> + * + * @return creation time of Subscriber instance + */ + Date getPublisherCreationTime(); + + +} diff --git a/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisherFactory.java b/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisherFactory.java new file mode 100644 index 0000000..0e71559 --- /dev/null +++ b/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisherFactory.java @@ -0,0 +1,49 @@ +/* + * ===============================LICENSE_START====================================== + * dcae-analytics + * ================================================================================ + * Copyright © 2017 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * ============================LICENSE_END=========================================== + */ + +package org.openecomp.dcae.apod.analytics.dmaap.service.publisher; + +import org.openecomp.dcae.apod.analytics.dmaap.DMaaPMRFactory; +import org.openecomp.dcae.apod.analytics.dmaap.domain.config.DMaaPMRPublisherConfig; + +/** + * <p> + * Factory to initialize instance of {@link DMaaPMRPublisher} for Guice DI injection purposes. + * <p> + * <strong> + * NOTE: Client should not use this Factory to initialize {@link DMaaPMRPublisher} unless they + * are wiring dependencies using Guice. Client must use {@link DMaaPMRFactory} to initialize + * guice injected Publisher instances + * </strong> + * <p> + * @author Rajiv Singla . Creation Date: 10/20/2016. + */ +public interface DMaaPMRPublisherFactory { + + /** + * Guice Factory to create DMaaP MR Publisher + * + * @param publisherConfig publisher config + * + * @return DMaaP MR Publisher instance + */ + DMaaPMRPublisher create(DMaaPMRPublisherConfig publisherConfig); + +} diff --git a/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisherImpl.java b/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisherImpl.java new file mode 100644 index 0000000..1901189 --- /dev/null +++ b/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisherImpl.java @@ -0,0 +1,209 @@ +/* + * ===============================LICENSE_START====================================== + * dcae-analytics + * ================================================================================ + * Copyright © 2017 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * ============================LICENSE_END=========================================== + */ + +package org.openecomp.dcae.apod.analytics.dmaap.service.publisher; + +import com.google.common.base.Optional; +import com.google.common.collect.Iterables; +import com.google.common.collect.Lists; +import com.google.inject.Inject; +import com.google.inject.assistedinject.Assisted; +import org.apache.commons.lang3.tuple.Pair; +import org.apache.http.HttpHeaders; +import org.apache.http.client.HttpClient; +import org.apache.http.client.methods.HttpPost; +import org.apache.http.entity.ContentType; +import org.apache.http.entity.StringEntity; +import org.apache.http.impl.client.CloseableHttpClient; +import org.openecomp.dcae.apod.analytics.common.AnalyticsConstants; +import org.openecomp.dcae.apod.analytics.common.exception.DCAEAnalyticsRuntimeException; +import org.openecomp.dcae.apod.analytics.dmaap.domain.config.DMaaPMRPublisherConfig; +import org.openecomp.dcae.apod.analytics.dmaap.domain.response.DMaaPMRPublisherResponse; +import org.openecomp.dcae.apod.analytics.dmaap.service.BaseDMaaPMRComponent; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.IOException; +import java.net.URI; +import java.util.Date; +import java.util.List; + +import static org.openecomp.dcae.apod.analytics.common.utils.HTTPUtils.isSuccessfulResponseCode; +import static java.lang.String.format; + +/** + * Concrete Implementation of {@link DMaaPMRPublisher} which uses {@link HttpClient} + * + * @author Rajiv Singla . Creation Date: 10/13/2016. + */ +public class DMaaPMRPublisherImpl extends BaseDMaaPMRComponent implements DMaaPMRPublisher { + + private static final Logger LOG = LoggerFactory.getLogger(DMaaPMRPublisherImpl.class); + + private final DMaaPMRPublisherConfig publisherConfig; + private final CloseableHttpClient closeableHttpClient; + private final DMaaPMRPublisherQueue publisherQueue; + private final Date publisherCreationTime; + private URI publisherUri; + + @Inject + public DMaaPMRPublisherImpl(@Assisted DMaaPMRPublisherConfig publisherConfig, + DMaaPMRPublisherQueueFactory dMaaPMRPublisherQueueFactory, + CloseableHttpClient closeableHttpClient) { + + this.publisherConfig = publisherConfig; + this.publisherQueue = dMaaPMRPublisherQueueFactory.create( + publisherConfig.getMaxBatchSize(), publisherConfig.getMaxRecoveryQueueSize()); + this.closeableHttpClient = closeableHttpClient; + this.publisherUri = createPublisherURI(publisherConfig); + this.publisherCreationTime = new Date(); + } + + + @Override + public DMaaPMRPublisherResponse publish(List<String> messages) { + + final int batchQueueRemainingSize = publisherQueue.getBatchQueueRemainingSize(); + + // if messages size is less than batch queue size - just queue them for batch publishing + if (batchQueueRemainingSize > messages.size()) { + LOG.debug("Adding messages to batch Queue. No flushing required. Messages Size:{}. Batch Queue Size:{}", + messages.size(), batchQueueRemainingSize); + final int batchQueueSize = publisherQueue.addBatchMessages(messages); + return createPublisherAcceptedResponse(batchQueueSize); + + } else { + + // grab all already queued messages, append current messages and force publish them to DMaaP MR topic + final List<String> queueMessages = publisherQueue.getMessageForPublishing(); + LOG.debug("Batch Queue capacity exceeds messages size. Flushing of all pending messages to DMaaP MR " + + "Publisher Topic."); + return forcePublish(Lists.newLinkedList(Iterables.concat(queueMessages, messages))); + } + + } + + @Override + public DMaaPMRPublisherResponse forcePublish(List<String> messages) { + + LOG.debug("Force publishing messages to DMaaP MR Topic. Messages Size: {}", messages.size()); + + final String contentType = publisherConfig.getContentType(); + final String userName = publisherConfig.getUserName(); + final String userPassword = publisherConfig.getUserPassword(); + final HttpPost postRequest = new HttpPost(publisherUri); + + // add Authorization Header if username and password are present + final Optional<String> authHeader = getAuthHeader(userName, userPassword); + if (authHeader.isPresent()) { + postRequest.addHeader(HttpHeaders.AUTHORIZATION, authHeader.get()); + } else { + LOG.debug("DMaaP MR Publisher Authentication is disabled as username or password is not present."); + } + + // Create post string entity + final String messagesJson = convertToJsonString(messages); + final StringEntity requestEntity = + new StringEntity(messagesJson, ContentType.create(contentType, "UTF-8")); + postRequest.setEntity(requestEntity); + + try { + final Pair<Integer, String> responsePair = closeableHttpClient.execute(postRequest, responseHandler()); + final Integer responseCode = responsePair.getLeft(); + final String responseBody = responsePair.getRight(); + // if messages were published successfully, return successful response + if (isSuccessfulResponseCode(responseCode)) { + LOG.debug("DMaaP MR Messages published successfully. DMaaP Response Code: {}. DMaaP Response " + + "Body: {}, Number of Messages published: {}", + responseCode, responseBody, messages.size()); + + } else { + LOG.warn("Unable to publish messages to DMaaP MR Topic. DMaaP Response Code: {}, DMaaP Response " + + "Body: {}. Messages will be queued in recovery queue", responseCode, responseBody); + addMessagesToRecoveryQueue(publisherQueue, messages); + } + + return createPublisherResponse(responseCode, responseBody, + getPendingMessages(publisherQueue, publisherConfig)); + + } catch (IOException e) { + // If IO Error then we need to also put messages in recovery queue + addMessagesToRecoveryQueue(publisherQueue, messages); + final String errorMessage = format("IO Exception while publishing messages to DMaaP Topic. " + + "Messages will be queued in recovery queue. Messages Size: %d", messages.size()); + + throw new DCAEAnalyticsRuntimeException(errorMessage, LOG, e); + } + + } + + + @Override + public DMaaPMRPublisherResponse flush() { + final List<String> queueMessages = publisherQueue.getMessageForPublishing(); + // If there are no message return 204 (No Content) response code + if (queueMessages.isEmpty()) { + LOG.debug("No messages to publish to batch queue. Returning 204 status code"); + return createPublisherNoContentResponse(); + } else { + // force publish messages in queue + return forcePublish(queueMessages); + } + } + + @Override + public Date getPublisherCreationTime() { + return new Date(publisherCreationTime.getTime()); + } + + @Override + public void close() throws Exception { + + // flush current message in the queue + int retrialNumber = 0; + int flushResponseCode; + + // automatic retries if messages cannot be flushed + do { + retrialNumber++; + DMaaPMRPublisherResponse flushResponse = flush(); + flushResponseCode = flushResponse.getResponseCode(); + + if (!isSuccessfulResponseCode(flushResponseCode)) { + LOG.warn("Unable to flush batch messages to publisher due to DMaaP MR invalid Response: {}. " + + "Retrial No: {} of Max {} Retries", flushResponseCode, retrialNumber, + AnalyticsConstants.PUBLISHER_MAX_FLUSH_RETRIES_ON_CLOSE); + + Thread.sleep(AnalyticsConstants.PUBLISHER_DELAY_MS_ON_RETRIES_ON_CLOSE); + } + } while (retrialNumber <= AnalyticsConstants.PUBLISHER_MAX_FLUSH_RETRIES_ON_CLOSE && + !isSuccessfulResponseCode(flushResponseCode)); + + if (!isSuccessfulResponseCode(flushResponseCode)) { + LOG.error("Unable to flush batch messages to publisher. Messages loss cannot be prevented"); + } else { + LOG.info("Successfully published all batched messages to publisher."); + } + + // close http client + closeableHttpClient.close(); + + } +} diff --git a/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisherQueue.java b/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisherQueue.java new file mode 100644 index 0000000..281af53 --- /dev/null +++ b/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisherQueue.java @@ -0,0 +1,87 @@ +/* + * ===============================LICENSE_START====================================== + * dcae-analytics + * ================================================================================ + * Copyright © 2017 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * ============================LICENSE_END=========================================== + */ + +package org.openecomp.dcae.apod.analytics.dmaap.service.publisher; + +import java.util.List; + +/** + * <p> + * DMaaP MR Publisher Queue handles back pressure in case DMaaP MR Publisher topic + * is offline for some reason. It does so by having a recovery queue which keeps + * messages in order in case there is temporary interruption in DMaaP Publisher + * </p> + * + * @author Rajiv Singla . Creation Date: 11/1/2016. + */ +public interface DMaaPMRPublisherQueue { + + /** + * <p> + * Add batchMessages to Batch Queue + * </p> + * + * @param batchMessages messages that needs to be added to batch queue + * @return current size of batch queue. Throws {@link IllegalStateException} + * if batch queue does not have enough space + */ + int addBatchMessages(List<String> batchMessages); + + + /** + * <p> + * Add recoverable messages to Recoverable Queue + * </p> + * + * @param recoverableMessages messages that needs to be added to recoverable queue + * @return current size of the recoverable queue. Throws {@link IllegalStateException} + * if recoverable queue does not have enough space + */ + int addRecoverableMessages(List<String> recoverableMessages); + + /** + * <p> + * Get messages that need to be published to DMaaP topic. Messages in recoverable + * queue are appended if present. + * </p> + * + * @return List of messages from both batch and recovery queue + */ + List<String> getMessageForPublishing(); + + /** + * <p> + * Remaining capacity of Batch Queue + * </p> + * + * @return Remaining Batch Queue Size + */ + int getBatchQueueRemainingSize(); + + /** + * <p> + * Remaining capacity of Recovery Queue + * </p> + * + * @return Remaining Recovery Queue Size + */ + int getRecoveryQueueRemainingSize(); + +} diff --git a/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisherQueueFactory.java b/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisherQueueFactory.java new file mode 100644 index 0000000..3ebc9dc --- /dev/null +++ b/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisherQueueFactory.java @@ -0,0 +1,45 @@ +/* + * ===============================LICENSE_START====================================== + * dcae-analytics + * ================================================================================ + * Copyright © 2017 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * ============================LICENSE_END=========================================== + */ + +package org.openecomp.dcae.apod.analytics.dmaap.service.publisher; + +import com.google.inject.assistedinject.Assisted; + +/** + * <p> + * Factory to initialize instance of {@link DMaaPMRPublisherQueue} for Guice DI injection purposes. + * <p> + * + * @author Rajiv Singla . Creation Date: 11/1/2016. + */ +public interface DMaaPMRPublisherQueueFactory { + + /** + * Guice Factory to create DMaaP MR Publisher Queue + * + * @param batchQueueSize batch queue size + * @param recoveryQueueSize recovery queue size + * + * @return instance of DMaaP MR Publisher Queue + */ + DMaaPMRPublisherQueue create(@Assisted("batchQueueSize") int batchQueueSize, + @Assisted("recoveryQueueSize") int recoveryQueueSize); + +} diff --git a/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisherQueueImpl.java b/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisherQueueImpl.java new file mode 100644 index 0000000..936abe3 --- /dev/null +++ b/dcae-analytics-dmaap/src/main/java/org/openecomp/dcae/apod/analytics/dmaap/service/publisher/DMaaPMRPublisherQueueImpl.java @@ -0,0 +1,126 @@ +/* + * ===============================LICENSE_START====================================== + * dcae-analytics + * ================================================================================ + * Copyright © 2017 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * ============================LICENSE_END=========================================== + */ + +package org.openecomp.dcae.apod.analytics.dmaap.service.publisher; + +import com.google.inject.Inject; +import com.google.inject.assistedinject.Assisted; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.util.LinkedList; +import java.util.List; +import java.util.concurrent.LinkedBlockingDeque; + +import static com.google.common.collect.Iterables.concat; +import static com.google.common.collect.Lists.newLinkedList; +import static java.util.Collections.unmodifiableList; + +/** + * <p> + * An implementation of {@link DMaaPMRPublisherQueue} which uses {@link java.util.concurrent.BlockingDeque} + * for batch and recovery queues + * </p> + * + * + * @author Rajiv Singla . Creation Date: 11/1/2016. + */ +public class DMaaPMRPublisherQueueImpl implements DMaaPMRPublisherQueue { + + private static final Logger LOG = LoggerFactory.getLogger(DMaaPMRPublisherQueueImpl.class); + + private final LinkedBlockingDeque<String> batchQueue; + private final LinkedBlockingDeque<String> recoveryQueue; + + @Inject + public DMaaPMRPublisherQueueImpl(@Assisted("batchQueueSize") int batchQueueSize, + @Assisted("recoveryQueueSize") int recoveryQueueSize) { + batchQueue = new LinkedBlockingDeque<>(batchQueueSize); + recoveryQueue = new LinkedBlockingDeque<>(recoveryQueueSize); + LOG.debug("Creating Instance of DMaaP Publisher Queue. BatchQueueSize: {}, RecoveryQueueSize: {}", + batchQueueSize, recoveryQueueSize); + } + + @Override + public synchronized int addBatchMessages(List<String> batchMessages) { + + // checks if batchMessages size does not exceed batch queue capacity + if (batchMessages.size() > batchQueue.remainingCapacity()) { + throw new IllegalStateException("Not enough capacity to add batchMessages in batch queue"); + } + + // Add batchMessages to batch queue + for (String message : batchMessages) { + batchQueue.add(message); + } + + // returns current elements size in batch queue + return batchQueue.size(); + } + + @Override + public synchronized int addRecoverableMessages(List<String> recoverableMessages) { + + // checks if messages size does not exceed recovery queue size + if (recoverableMessages.size() > recoveryQueue.remainingCapacity()) { + throw new IllegalStateException("Not enough capacity to add messages in recovery queue"); + } + + // add messages to recovery queue + for (String recoverableMessage : recoverableMessages) { + recoveryQueue.add(recoverableMessage); + } + + // returns current size of recovery queue + return recoveryQueue.size(); + } + + @Override + public synchronized List<String> getMessageForPublishing() { + + final List<String> recoveryMessageList = new LinkedList<>(); + final List<String> batchMessagesList = new LinkedList<>(); + + // get messages from recovery queue if present + if (!recoveryQueue.isEmpty()) { + final int recoveryQueueSize = recoveryQueue.drainTo(recoveryMessageList); + LOG.debug("Drained Recovery Queue elements for flushing: {}", recoveryQueueSize); + } + + // get messages from batch queue if present + if (!batchQueue.isEmpty()) { + final int batchQueueSize = batchQueue.drainTo(batchMessagesList); + LOG.debug("Drained Batch Queue elements for flushing: {}", batchQueueSize); + } + + // concat recovery and batch queue elements + return unmodifiableList(newLinkedList(concat(recoveryMessageList, batchMessagesList))); + } + + @Override + public synchronized int getBatchQueueRemainingSize() { + return batchQueue.remainingCapacity(); + } + + @Override + public synchronized int getRecoveryQueueRemainingSize() { + return recoveryQueue.remainingCapacity(); + } +} |