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Refactor store-update into store-sync
* Add both EPL and EDL licenses * Rename artefacts in POMs * Rebase on top of the Jena 3.6.0 move Signed-off-by: Andrew Berezovskyi <[email protected]>
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| Eclipse Distribution License - v 1.0 | ||
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| Copyright (c) 2007, Eclipse Foundation, Inc. and its licensors. | ||
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| All rights reserved. | ||
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| Redistribution and use in source and binary forms, with or without | ||
| modification, are permitted provided that the following conditions are met: | ||
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| * Redistributions of source code must retain the above copyright notice, this | ||
| list of conditions and the following disclaimer. | ||
| * Redistributions in binary form must reproduce the above copyright notice, | ||
| this list of conditions and the following disclaimer in the documentation | ||
| and/or other materials provided with the distribution. | ||
| * Neither the name of the Eclipse Foundation, Inc. nor the names of its | ||
| contributors may be used to endorse or promote products derived from this | ||
| software without specific prior written permission. | ||
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| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | ||
| ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | ||
| WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | ||
| DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR | ||
| ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | ||
| (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | ||
| LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | ||
| ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
| SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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16 changes: 16 additions & 0 deletions
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src/store-sync/src/main/java/org/eclipse/lyo/store/sync/Handler.java
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| package org.eclipse.lyo.store.sync; | ||
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| import java.util.Collection; | ||
| import org.eclipse.lyo.store.Store; | ||
| import org.eclipse.lyo.store.sync.change.Change; | ||
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| /** | ||
| * Handler is . | ||
| * | ||
| * @author Andrew Berezovskyi ([email protected]) | ||
| * @version $version-stub$ | ||
| * @since 0.0.0 | ||
| */ | ||
| public interface Handler<M> { | ||
| Collection<Change<M>> handle(Store store, Collection<Change<M>> changes); | ||
| } |
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src/store-sync/src/main/java/org/eclipse/lyo/store/sync/ServiceProviderMessage.java
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| package org.eclipse.lyo.store.sync; | ||
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| import java.net.URI; | ||
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| /** | ||
| * Created on 06.03.17 | ||
| * | ||
| * @author Andrew Berezovskyi ([email protected]) | ||
| * @version $version-stub$ | ||
| * @since 0.0.1 | ||
| */ | ||
| public interface ServiceProviderMessage { | ||
| URI getServiceProviderUri(); | ||
| } |
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src/store-sync/src/main/java/org/eclipse/lyo/store/sync/StoreUpdateManager.java
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| package org.eclipse.lyo.store.sync; | ||
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| import java.time.ZonedDateTime; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.concurrent.Executors; | ||
| import java.util.concurrent.Future; | ||
| import java.util.concurrent.ScheduledExecutorService; | ||
| import java.util.concurrent.TimeUnit; | ||
| import org.eclipse.lyo.store.Store; | ||
| import org.eclipse.lyo.store.sync.change.Change; | ||
| import org.eclipse.lyo.store.sync.change.ChangeProvider; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| /** | ||
| * Schedules {@link StoreUpdateRunnable} via internal | ||
| * {@link ScheduledExecutorService} with a predefined delay or on-demand. | ||
| * Operates on a generic message that is passed to handlers. | ||
| * | ||
| * @author Andrew Berezovskyi ([email protected]) | ||
| * @version $version-stub$ | ||
| * @since 0.0.0 | ||
| */ | ||
| public class StoreUpdateManager<M> { | ||
| private final static Logger LOGGER = LoggerFactory.getLogger(StoreUpdateManager.class); | ||
| private static final int NODELAY = 0; | ||
| private static final int SINGLE_THREAD_POOL = 1; | ||
| private final ScheduledExecutorService executor; | ||
| private final ChangeProvider<M> changeProvider; | ||
| private final Store store; | ||
| private final List<Handler<M>> handlers = new ArrayList<>(); | ||
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| /** | ||
| * Schedules {@link StoreUpdateRunnable} via internal | ||
| * {@link ScheduledExecutorService} with a predefined delay or on-demand. | ||
| * | ||
| * @param store | ||
| * Instance of an initialised Store | ||
| * @param changeProvider | ||
| * Provider of the changes in the underlying tool. | ||
| */ | ||
| public StoreUpdateManager(final Store store, final ChangeProvider<M> changeProvider) { | ||
| executor = Executors.newScheduledThreadPool(StoreUpdateManager.SINGLE_THREAD_POOL); | ||
| this.store = store; | ||
| this.changeProvider = changeProvider; | ||
| } | ||
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| /** | ||
| * Polling update on a given {@link ChangeProvider} followed by a notification | ||
| * to all previously registered {@link Handler} objects. | ||
| * | ||
| * @param lastUpdate | ||
| * Time of last store update, changes before this moment might be | ||
| * dropped. | ||
| * @param delaySeconds | ||
| * Seconds between polling checks. | ||
| */ | ||
| public void poll(final ZonedDateTime lastUpdate, final int delaySeconds) { | ||
| final StoreUpdateRunnable<M> updateRunnable = buildRunnable(store, changeProvider, lastUpdate, null, handlers); | ||
| executor.scheduleWithFixedDelay(updateRunnable, StoreUpdateManager.NODELAY, delaySeconds, TimeUnit.SECONDS); | ||
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| StoreUpdateManager.LOGGER.trace("Poll request has been enqueued"); | ||
| } | ||
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| /** | ||
| * Submit a single update request. Typically done from the HTTP handler. | ||
| * | ||
| * @param lastUpdate | ||
| * @param message | ||
| * Specific details for the {@link ChangeProvider} | ||
| * @return {@link Future} that allows to block until the runnable is finished | ||
| * executing (strongly discouraged). | ||
| */ | ||
| public Future<?> submit(final ZonedDateTime lastUpdate, final M message) { | ||
| final StoreUpdateRunnable<M> updateRunnable = buildRunnable(store, changeProvider, lastUpdate, message, | ||
| handlers); | ||
| return executor.submit(updateRunnable); | ||
| } | ||
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| /** | ||
| * Add a {@link Handler} that will process the collection of {@link Change} | ||
| * generated by the {@link ChangeProvider}. Handler is not guaranteed to be | ||
| * called if added after the update has been scheduled. | ||
| * | ||
| * @param handler | ||
| * Handler that should be called whenever {@link ChangeProvider} | ||
| * returns any changes. | ||
| */ | ||
| public void addHandler(final Handler<M> handler) { | ||
| handlers.add(handler); | ||
| } | ||
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| /** | ||
| * Method can be overridden in case a more sophisticated Runnable has to be | ||
| * constructed. | ||
| */ | ||
| protected StoreUpdateRunnable<M> buildRunnable(final Store store, final ChangeProvider<M> changeProvider, | ||
| final ZonedDateTime lastUpdate, final M message, final List<Handler<M>> handlers) { | ||
| return new StoreUpdateRunnable<>(store, changeProvider, lastUpdate, message, handlers); | ||
| } | ||
| } |
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