/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.nifi.provenance.store;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.nifi.provenance.ProvenanceEventRecord;
import org.apache.nifi.provenance.authorization.EventAuthorizer;
import org.apache.nifi.provenance.authorization.EventTransformer;
import org.apache.nifi.provenance.index.EventIndex;
import org.apache.nifi.provenance.serialization.StorageSummary;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ArrayListEventStore implements EventStore {
private static final Logger logger = LoggerFactory.getLogger(ArrayListEventStore.class);
private final List<ProvenanceEventRecord> events = new ArrayList<>();
private final AtomicLong idGenerator = new AtomicLong(0L);
@Override
public void close() throws IOException {
}
@Override
public void initialize() throws IOException {
}
public StorageResult addEvent(final ProvenanceEventRecord event) {
return addEvents(Collections.singleton(event));
}
@Override
public synchronized StorageResult addEvents(Iterable<ProvenanceEventRecord> events) {
final Map<ProvenanceEventRecord, StorageSummary> storageLocations = new HashMap<>();
for (final ProvenanceEventRecord event : events) {
this.events.add(event);
final StorageSummary storageSummary = new StorageSummary(idGenerator.getAndIncrement(), "location", "1", 1, 0L, 0L);
storageLocations.put(event, storageSummary);
}
return new StorageResult() {
@Override
public Map<ProvenanceEventRecord, StorageSummary> getStorageLocations() {
return storageLocations;
}
@Override
public boolean triggeredRollover() {
return false;
}
@Override
public Integer getEventsRolledOver() {
return null;
}
};
}
@Override
public long getSize() throws IOException {
return 0;
}
@Override
public long getMaxEventId() {
return idGenerator.get() - 1;
}
@Override
public synchronized Optional<ProvenanceEventRecord> getEvent(long id) throws IOException {
if (events.size() <= id) {
return Optional.empty();
}
return Optional.ofNullable(events.get((int) id));
}
@Override
public List<ProvenanceEventRecord> getEvents(long firstRecordId, int maxResults) throws IOException {
return getEvents(firstRecordId, maxResults, EventAuthorizer.GRANT_ALL, EventTransformer.EMPTY_TRANSFORMER);
}
@Override
public List<ProvenanceEventRecord> getEvents(long firstRecordId, int maxResults, EventAuthorizer authorizer, EventTransformer transformer) throws IOException {
final List<ProvenanceEventRecord> events = new ArrayList<>();
for (int i = 0; i < maxResults; i++) {
final Optional<ProvenanceEventRecord> eventOption = getEvent(firstRecordId + i);
if (!eventOption.isPresent()) {
break;
}
events.add(eventOption.get());
}
return events;
}
@Override
public List<ProvenanceEventRecord> getEvents(final List<Long> eventIds, final EventAuthorizer authorizer, final EventTransformer transformer) {
final List<ProvenanceEventRecord> events = new ArrayList<>();
for (final Long eventId : eventIds) {
final Optional<ProvenanceEventRecord> eventOption;
try {
eventOption = getEvent(eventId);
} catch (final Exception e) {
logger.warn("Failed to retrieve event with ID " + eventId, e);
continue;
}
if (!eventOption.isPresent()) {
continue;
}
if (authorizer.isAuthorized(eventOption.get())) {
events.add(eventOption.get());
} else {
final Optional<ProvenanceEventRecord> transformedOption = transformer.transform(eventOption.get());
if (transformedOption.isPresent()) {
events.add(transformedOption.get());
}
}
}
return events;
}
@Override
public void reindexLatestEvents(EventIndex eventIndex) {
}
}