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87 changes: 87 additions & 0 deletions
87
hivemq-edge/src/main/java/com/hivemq/edge/impl/events/v2/EventServiceDelegateImpl.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| /* | ||
| * Copyright 2019-present HiveMQ GmbH | ||
| * | ||
| * 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. | ||
| */ | ||
| package com.hivemq.edge.impl.events.v2; | ||
|
|
||
| import com.google.common.base.Preconditions; | ||
| import com.hivemq.adapter.sdk.api.eventsv2.Event; | ||
| import com.hivemq.adapter.sdk.api.eventsv2.EventsService; | ||
| import com.hivemq.bootstrap.factories.EventServiceHandling; | ||
| import com.hivemq.bootstrap.factories.EventServiceHandlingProvider; | ||
| import com.hivemq.bootstrap.factories.EventServiceResult; | ||
| import com.hivemq.configuration.service.ConfigurationService; | ||
| import com.hivemq.extension.sdk.api.annotations.NotNull; | ||
| import com.hivemq.extension.sdk.api.annotations.Nullable; | ||
| import com.hivemq.extension.sdk.api.services.publish.Publish; | ||
| import com.hivemq.extension.sdk.api.services.publish.PublishService; | ||
| import com.hivemq.extensions.services.builder.PublishBuilderImpl; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
||
| import javax.inject.Inject; | ||
| import javax.inject.Singleton; | ||
| import java.util.List; | ||
|
|
||
| /** | ||
| * SPI delegate which wraps multiple (chained) implementations and | ||
| * manages the event listeners | ||
| * | ||
| * @author Simon L Johnson | ||
| */ | ||
| @Singleton | ||
| public class EventServiceDelegateImpl implements EventsService { | ||
|
|
||
| private final @NotNull InMemoryEvent eventStore; | ||
| private final @NotNull EventServiceHandlingProvider eventServiceHandlingProvider; | ||
| private final @NotNull PublishService publishService; | ||
| private final @NotNull ConfigurationService configurationService; | ||
|
|
||
| @Inject | ||
| public EventServiceDelegateImpl( | ||
| final @NotNull InMemoryEvent eventStore, | ||
| final @NotNull EventServiceHandlingProvider eventServiceHandlingProvider, | ||
| final @NotNull PublishService publishService, | ||
| final @NotNull ConfigurationService configurationService) { | ||
| this.eventServiceHandlingProvider = eventServiceHandlingProvider; | ||
| this.publishService = publishService; | ||
| this.configurationService = configurationService; | ||
| Preconditions.checkNotNull(eventStore); | ||
| this.eventStore = eventStore; | ||
| } | ||
|
|
||
| @Override | ||
| public void publish(final @NotNull Event event) { | ||
|
|
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| final EventServiceHandling eventServiceHandling = eventServiceHandlingProvider.get(); | ||
| if (eventServiceHandling != null) { | ||
| final EventServiceResult eventServiceResult = eventServiceHandling.apply(event); | ||
| if (!eventServiceResult.isPreventPublish()) { | ||
| // publish can not be null if preventPublish is false | ||
| assert eventServiceResult.getModifiedPublish() != null; | ||
| final Publish publish = | ||
| new PublishBuilderImpl(configurationService).fromPublish(eventServiceResult.getModifiedPublish()) | ||
| .build(); | ||
| publishService.publish(publish); | ||
| } | ||
| } | ||
| eventStore.storeEvent(event); | ||
| } | ||
|
|
||
| @Override | ||
| public @NotNull List<Event> readEvents( | ||
| final @Nullable Long sinceTimestamp, final @Nullable Integer limit) { | ||
| return eventStore.readEvents(sinceTimestamp, limit); | ||
| } | ||
| } |
84 changes: 84 additions & 0 deletions
84
hivemq-edge/src/main/java/com/hivemq/edge/impl/events/v2/InMemoryEvent.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| /* | ||
| * Copyright 2019-present HiveMQ GmbH | ||
| * | ||
| * 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. | ||
| */ | ||
| package com.hivemq.edge.impl.events.v2; | ||
|
|
||
| import com.hivemq.adapter.sdk.api.eventsv2.Event; | ||
| import com.hivemq.configuration.service.InternalConfigurations; | ||
| import com.hivemq.extension.sdk.api.annotations.NotNull; | ||
| import com.hivemq.extension.sdk.api.annotations.Nullable; | ||
| import com.hivemq.util.RollingList; | ||
|
|
||
| import javax.inject.Inject; | ||
| import javax.inject.Singleton; | ||
| import java.util.ArrayList; | ||
| import java.util.Comparator; | ||
| import java.util.List; | ||
| import java.util.concurrent.locks.Lock; | ||
| import java.util.concurrent.locks.ReadWriteLock; | ||
| import java.util.concurrent.locks.ReentrantReadWriteLock; | ||
| import java.util.stream.Collectors; | ||
| import java.util.stream.Stream; | ||
|
|
||
| /** | ||
| * Simple rolling list implementation optimized for fast writes but slow reads as requires sort on read. (Handled | ||
| * out of lock). | ||
| * | ||
| * @author Simon L Johnson | ||
| */ | ||
| @Singleton | ||
| public class InMemoryEvent{ | ||
| private final @NotNull RollingList<Event> inMemoryEventList; | ||
| private final @NotNull ReadWriteLock lock = new ReentrantReadWriteLock(); | ||
|
|
||
| @Inject | ||
| public InMemoryEvent() { | ||
| //optimize for quick write slow read (sort) | ||
| this(InternalConfigurations.EDGE_RUNTIME_MAX_EVENTS_IN_INMEMORY_LIST.get()); | ||
| } | ||
|
|
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| public InMemoryEvent(final int max) { | ||
| this.inMemoryEventList = new RollingList<>(max); | ||
| } | ||
|
|
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| public void storeEvent(final @NotNull Event event) { | ||
| Lock writeLock = lock.writeLock(); | ||
| try { | ||
| writeLock.lock(); | ||
| inMemoryEventList.add(event); | ||
| } finally { | ||
| writeLock.unlock(); | ||
| } | ||
| } | ||
|
|
||
| public @NotNull List<Event> readEvents(@Nullable Long since, @Nullable Integer limit) { | ||
| Lock readLock = lock.writeLock(); | ||
| List<Event> events; | ||
| try { | ||
| readLock.lock(); | ||
| events = new ArrayList<>(inMemoryEventList); | ||
| } finally { | ||
| readLock.unlock(); | ||
| } | ||
| Stream<Event> stream = events.stream().sorted(Comparator.comparing(Event::getCreated).reversed()); | ||
| if (since != null) { | ||
| stream = stream.filter(event -> since < event.getCreated().getTime()); | ||
| } | ||
| if (limit != null) { | ||
| stream = stream.limit(limit); | ||
| } | ||
| return stream.collect(Collectors.toUnmodifiableList()); | ||
| } | ||
| } |
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