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Posted to commits@falcon.apache.org by aj...@apache.org on 2016/01/11 10:47:24 UTC
[4/4] falcon git commit: FALCON-1230 Data based notification Service
to notify execution instances when data becomes available. Contributed by
Pavan Kumar Kolamuri.
FALCON-1230 Data based notification Service to notify execution instances when data becomes available. Contributed by Pavan Kumar Kolamuri.
Project: http://git-wip-us.apache.org/repos/asf/falcon/repo
Commit: http://git-wip-us.apache.org/repos/asf/falcon/commit/4656f692
Tree: http://git-wip-us.apache.org/repos/asf/falcon/tree/4656f692
Diff: http://git-wip-us.apache.org/repos/asf/falcon/diff/4656f692
Branch: refs/heads/master
Commit: 4656f692a3c96244f0291501c3b68e14af964f27
Parents: 65bd4d1
Author: Ajay Yadava <aj...@gmail.com>
Authored: Mon Jan 11 14:54:34 2016 +0530
Committer: Ajay Yadava <aj...@gmail.com>
Committed: Mon Jan 11 14:54:34 2016 +0530
----------------------------------------------------------------------
CHANGES.txt | 2 +
.../execution/ProcessExecutionInstance.java | 38 ++--
.../notification/service/event/DataEvent.java | 19 +-
.../service/impl/DataAvailabilityService.java | 210 +++++++++++++++++--
.../request/DataNotificationRequest.java | 124 +++++++++--
.../org/apache/falcon/predicate/Predicate.java | 18 +-
.../execution/FalconExecutionServiceTest.java | 10 +-
.../service/DataAvailabilityServiceTest.java | 135 ++++++++++++
8 files changed, 482 insertions(+), 74 deletions(-)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/falcon/blob/4656f692/CHANGES.txt
----------------------------------------------------------------------
diff --git a/CHANGES.txt b/CHANGES.txt
index e3244de..8792f94 100755
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -12,6 +12,8 @@ Proposed Release Version: 0.9
INCOMPATIBLE CHANGES
NEW FEATURES
+ FALCON-1230 Data based notification Service to notify execution instances when data becomes available(Pavan Kumar Kolamuri via Ajay Yadava)
+
FALCON-1679 API to get type of scheduler(native/oozie) (Pallavi Rao)
FALCON-1645 Ability to export to database(Venkat Ramachandran via Balu Vellanki)
http://git-wip-us.apache.org/repos/asf/falcon/blob/4656f692/scheduler/src/main/java/org/apache/falcon/execution/ProcessExecutionInstance.java
----------------------------------------------------------------------
diff --git a/scheduler/src/main/java/org/apache/falcon/execution/ProcessExecutionInstance.java b/scheduler/src/main/java/org/apache/falcon/execution/ProcessExecutionInstance.java
index 72e5558..8f026b7 100644
--- a/scheduler/src/main/java/org/apache/falcon/execution/ProcessExecutionInstance.java
+++ b/scheduler/src/main/java/org/apache/falcon/execution/ProcessExecutionInstance.java
@@ -17,6 +17,7 @@
*/
package org.apache.falcon.execution;
+import org.apache.commons.lang3.StringUtils;
import org.apache.falcon.FalconException;
import org.apache.falcon.entity.EntityUtil;
import org.apache.falcon.entity.FeedHelper;
@@ -119,29 +120,36 @@ public class ProcessExecutionInstance extends ExecutionInstance {
continue;
}
Feed feed = ConfigurationStore.get().get(EntityType.FEED, input.getFeed());
+ List<Path> paths = new ArrayList<>();
for (org.apache.falcon.entity.v0.feed.Cluster cluster : feed.getClusters().getClusters()) {
List<Location> locations = FeedHelper.getLocations(cluster, feed);
for (Location loc : locations) {
if (loc.getType() != LocationType.DATA) {
continue;
}
+ paths.add(new Path(loc.getPath()));
+ }
- Predicate predicate = Predicate.createDataPredicate(loc);
- // To ensure we evaluate only predicates not evaluated before when an instance is resumed.
- if (isResume && !awaitedPredicates.contains(predicate)) {
- continue;
- }
- // TODO : Revisit this once the Data Availability Service has been built
- DataAvailabilityService.DataRequestBuilder requestBuilder =
- (DataAvailabilityService.DataRequestBuilder)
- NotificationServicesRegistry.getService(NotificationServicesRegistry.SERVICE.DATA)
- .createRequestBuilder(executionService, getId());
- requestBuilder.setDataLocation(new Path(loc.getPath()));
- NotificationServicesRegistry.register(requestBuilder.build());
- LOG.info("Registered for a data notification for process {} for data location {}",
- process.getName(), loc.getPath());
- awaitedPredicates.add(predicate);
+ Predicate predicate = Predicate.createDataPredicate(paths);
+ // To ensure we evaluate only predicates not evaluated before when an instance is resumed.
+ if (isResume && !awaitedPredicates.contains(predicate)) {
+ continue;
}
+ // TODO : Revisit this once the Data Notification Service has been built
+ // TODO Very IMP : Need to change the polling frequency
+ DataAvailabilityService.DataRequestBuilder requestBuilder =
+ (DataAvailabilityService.DataRequestBuilder)
+ NotificationServicesRegistry.getService(NotificationServicesRegistry.SERVICE.DATA)
+ .createRequestBuilder(executionService, getId());
+ requestBuilder.setLocations(paths)
+ .setCluster(cluster.getName())
+ .setPollingFrequencyInMillis(100)
+ .setTimeoutInMillis(getTimeOutInMillis())
+ .setLocations(paths);
+ NotificationServicesRegistry.register(requestBuilder.build());
+ LOG.info("Registered for a data notification for process {} for data location {}",
+ process.getName(), StringUtils.join(paths, ","));
+ awaitedPredicates.add(predicate);
}
}
}
http://git-wip-us.apache.org/repos/asf/falcon/blob/4656f692/scheduler/src/main/java/org/apache/falcon/notification/service/event/DataEvent.java
----------------------------------------------------------------------
diff --git a/scheduler/src/main/java/org/apache/falcon/notification/service/event/DataEvent.java b/scheduler/src/main/java/org/apache/falcon/notification/service/event/DataEvent.java
index 1036339..083f66c 100644
--- a/scheduler/src/main/java/org/apache/falcon/notification/service/event/DataEvent.java
+++ b/scheduler/src/main/java/org/apache/falcon/notification/service/event/DataEvent.java
@@ -18,18 +18,18 @@
package org.apache.falcon.notification.service.event;
-import org.apache.falcon.entity.v0.feed.LocationType;
import org.apache.falcon.state.ID;
import org.apache.hadoop.fs.Path;
+import java.util.List;
+
/**
* An event generated by {@link org.apache.falcon.notification.service.impl.DataAvailabilityService}
* indicating availability or non-availability of a dataset.
*/
public class DataEvent extends Event {
private final ID callbackID;
- private Path dataLocation;
- private LocationType dataType;
+ private List<Path> dataLocations;
private STATUS status;
/**
@@ -40,10 +40,9 @@ public class DataEvent extends Event {
UNAVAILABLE
}
- public DataEvent(ID callbackID, Path location, LocationType locType, STATUS availability) {
+ public DataEvent(ID callbackID, List<Path> dataLocations, STATUS availability) {
this.callbackID = callbackID;
- this.dataLocation = location;
- this.dataType = locType;
+ this.dataLocations = dataLocations;
this.status = availability;
this.type = EventType.DATA_AVAILABLE;
}
@@ -56,12 +55,12 @@ public class DataEvent extends Event {
this.status = availability;
}
- public Path getDataLocation() {
- return dataLocation;
+ public List<Path> getDataLocations() {
+ return dataLocations;
}
- public LocationType getDataType() {
- return dataType;
+ public void setDataLocations(List<Path> locations) {
+ this.dataLocations = locations;
}
@Override
http://git-wip-us.apache.org/repos/asf/falcon/blob/4656f692/scheduler/src/main/java/org/apache/falcon/notification/service/impl/DataAvailabilityService.java
----------------------------------------------------------------------
diff --git a/scheduler/src/main/java/org/apache/falcon/notification/service/impl/DataAvailabilityService.java b/scheduler/src/main/java/org/apache/falcon/notification/service/impl/DataAvailabilityService.java
index 7ffb351..732da62 100644
--- a/scheduler/src/main/java/org/apache/falcon/notification/service/impl/DataAvailabilityService.java
+++ b/scheduler/src/main/java/org/apache/falcon/notification/service/impl/DataAvailabilityService.java
@@ -18,29 +18,62 @@
package org.apache.falcon.notification.service.impl;
import org.apache.falcon.FalconException;
+import org.apache.falcon.entity.ClusterHelper;
+import org.apache.falcon.entity.EntityUtil;
+import org.apache.falcon.entity.v0.Entity;
+import org.apache.falcon.entity.v0.EntityType;
+import org.apache.falcon.entity.v0.cluster.Cluster;
import org.apache.falcon.exception.NotificationServiceException;
import org.apache.falcon.execution.NotificationHandler;
+import org.apache.falcon.hadoop.HadoopClientFactory;
import org.apache.falcon.notification.service.FalconNotificationService;
+import org.apache.falcon.notification.service.event.DataEvent;
import org.apache.falcon.notification.service.request.DataNotificationRequest;
import org.apache.falcon.notification.service.request.NotificationRequest;
import org.apache.falcon.state.ID;
+import org.apache.falcon.util.StartupProperties;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.DelayQueue;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
/**
* This notification service notifies {@link NotificationHandler} when requested data
* becomes available. This class also supports time out, in which case it notifies about the unavailability.
- * TODO : Complete/Modify this skeletal class
*/
public class DataAvailabilityService implements FalconNotificationService {
+ private static final Logger LOG = LoggerFactory.getLogger(DataAvailabilityService.class);
+ private static final String NUM_THREADS_PROP = "scheduler.data.notification.service.threads";
+ private static final String DEFAULT_NUM_THREADS = "5";
+
+ private DelayQueue<DataNotificationRequest> delayQueue = new DelayQueue<>();
+ private ExecutorService executorService;
+ // It contains all instances which are unregistered and can be ignored.
+ private Map<ID, NotificationHandler> instancesToIgnore;
+
@Override
public void register(NotificationRequest request) throws NotificationServiceException {
- // TODO : Implement this
+ LOG.info("Registering Data notification for " + request.getCallbackId().toString());
+ DataNotificationRequest dataNotificationRequest = (DataNotificationRequest) request;
+ delayQueue.offer(dataNotificationRequest);
}
@Override
public void unregister(NotificationHandler handler, ID listenerID) {
- // TODO : Implement this
+ LOG.info("Removing Data notification Request with callbackID {}", listenerID.getKey());
+ instancesToIgnore.put(listenerID, handler);
}
@Override
@@ -55,40 +88,185 @@ public class DataAvailabilityService implements FalconNotificationService {
@Override
public void init() throws FalconException {
- // TODO : Implement this
+ int executorThreads = Integer.parseInt(StartupProperties.get().
+ getProperty(NUM_THREADS_PROP, DEFAULT_NUM_THREADS));
+ executorService = Executors.newFixedThreadPool(executorThreads);
+ for (int i = 0; i < executorThreads; i++) {
+ executorService.execute(new EventConsumer());
+ }
+ instancesToIgnore = new ConcurrentHashMap<>();
}
@Override
public void destroy() throws FalconException {
-
+ instancesToIgnore.clear();
+ delayQueue.clear();
+ executorService.shutdown();
}
/**
* Builds {@link DataNotificationRequest}.
*/
public static class DataRequestBuilder extends RequestBuilder<DataNotificationRequest> {
- private Path dataLocation;
+ private String cluster;
+ private long pollingFrequencyInMillis;
+ private long timeoutInMillis;
+ private Map<Path, Boolean> locations;
public DataRequestBuilder(NotificationHandler handler, ID callbackID) {
super(handler, callbackID);
}
- /**
- * @param location
- * @return This instance
- */
- public DataRequestBuilder setDataLocation(Path location) {
- this.dataLocation = location;
+ public DataRequestBuilder setLocations(List<Path> locPaths) {
+ Map<Path, Boolean> paths = new HashMap<>();
+ for (Path loc : locPaths) {
+ paths.put(loc, false);
+ }
+ this.locations = paths;
return this;
}
@Override
public DataNotificationRequest build() {
- if (callbackId == null || dataLocation == null) {
- throw new IllegalArgumentException("Missing one or more of the mandatory arguments:"
- + " callbackId, dataLocation");
+ if (callbackId == null || locations == null
+ || cluster == null || pollingFrequencyInMillis <= 0
+ || timeoutInMillis < pollingFrequencyInMillis) {
+ throw new IllegalArgumentException("Missing or incorrect, one or more of the mandatory arguments:"
+ + " callbackId, locations, dataType, cluster, pollingFrequency, waitTime");
+ }
+ return new DataNotificationRequest(handler, callbackId, cluster,
+ pollingFrequencyInMillis, timeoutInMillis, locations);
+ }
+
+ public DataRequestBuilder setCluster(String clusterName) {
+ this.cluster = clusterName;
+ return this;
+ }
+
+ public DataRequestBuilder setPollingFrequencyInMillis(long pollingFreq) {
+ if (pollingFreq <= 0) {
+ throw new IllegalArgumentException("PollingFrequency should be greater than zero");
+ }
+ this.pollingFrequencyInMillis = pollingFreq;
+ return this;
+ }
+
+ public DataRequestBuilder setTimeoutInMillis(long timeout) {
+ if (timeout <= 0 || timeout < pollingFrequencyInMillis) {
+ throw new IllegalArgumentException("Timeout should be positive and greater than PollingFrequency");
+ }
+ this.timeoutInMillis = timeout;
+ return this;
+ }
+ }
+
+
+ private class EventConsumer implements Runnable {
+
+ public EventConsumer() {
+ }
+
+ @Override
+ public void run() {
+ DataNotificationRequest dataNotificationRequest;
+ while (!Thread.currentThread().isInterrupted()) {
+ try {
+ dataNotificationRequest = delayQueue.take();
+ boolean isUnRegistered = isUnRegistered(dataNotificationRequest);
+ if (isUnRegistered) {
+ continue;
+ }
+ boolean isDataArrived = checkConditions(dataNotificationRequest);
+ if (isDataArrived) {
+ notifyHandler(dataNotificationRequest, DataEvent.STATUS.AVAILABLE);
+ } else {
+ if (dataNotificationRequest.isTimedout()) {
+ notifyHandler(dataNotificationRequest, DataEvent.STATUS.UNAVAILABLE);
+ continue;
+ }
+ dataNotificationRequest.accessed();
+ delayQueue.offer(dataNotificationRequest);
+ }
+ } catch (Throwable e) {
+ LOG.error("Error in Data Notification Service EventConsumer", e);
+ }
+ }
+ }
+
+ private void notifyHandler(DataNotificationRequest dataNotificationRequest,
+ DataEvent.STATUS status) {
+ DataEvent dataEvent = new DataEvent(dataNotificationRequest.getCallbackId(),
+ dataNotificationRequest.getLocations(), status);
+ boolean isUnRegistered = isUnRegistered(dataNotificationRequest);
+ if (isUnRegistered) {
+ return;
}
- return new DataNotificationRequest(handler, callbackId, dataLocation);
+ try {
+ LOG.debug("Notifying Handler for Data Notification Request of id {} " ,
+ dataNotificationRequest.getCallbackId().toString());
+ dataNotificationRequest.getHandler().onEvent(dataEvent);
+ } catch (FalconException e) {
+ LOG.error("Unable to notify Data event with id {} ",
+ dataNotificationRequest.getCallbackId(), e);
+ // ToDo Retries for notifying
+ }
+ }
+
+ private boolean isUnRegistered(DataNotificationRequest dataNotificationRequest) {
+ if (instancesToIgnore.containsKey(dataNotificationRequest.getCallbackId())) {
+ LOG.info("Ignoring Data Notification Request of id {} ",
+ dataNotificationRequest.getCallbackId().toString());
+ instancesToIgnore.remove(dataNotificationRequest.getCallbackId());
+ return true;
+ }
+ return false;
+ }
+
+ private boolean checkConditions(DataNotificationRequest dataNotificationRequest) {
+ try {
+ Entity entity = EntityUtil.getEntity(EntityType.CLUSTER, dataNotificationRequest.getCluster());
+ Cluster clusterEntity = (Cluster) entity;
+ Configuration conf = ClusterHelper.getConfiguration(clusterEntity);
+ FileSystem fs = HadoopClientFactory.get().createProxiedFileSystem(conf);
+ Map<Path, Boolean> locations = dataNotificationRequest.getLocationMap();
+ List<Path> nonAvailablePaths = getUnAvailablePaths(locations);
+ updatePathsAvailability(nonAvailablePaths, fs, locations);
+ if (allPathsExist(locations)) {
+ return true;
+ }
+ } catch (FalconException e) {
+ LOG.error("Retrieving the Cluster Entity " + e);
+ } catch (IOException e) {
+ LOG.error("Unable to connect to FileSystem " + e);
+ }
+ return false;
+ }
+
+ private void updatePathsAvailability(List<Path> unAvailablePaths, FileSystem fs,
+ Map<Path, Boolean> locations) throws IOException {
+ for (Path path : unAvailablePaths) {
+ if (fs.exists(path)) {
+ locations.put(path, true);
+ }
+ }
+ }
+
+ private List<Path> getUnAvailablePaths(Map<Path, Boolean> locations) {
+ List<Path> paths = new ArrayList<>();
+ for (Map.Entry<Path, Boolean> pathInfo : locations.entrySet()) {
+ if (!pathInfo.getValue()) {
+ paths.add(pathInfo.getKey());
+ }
+ }
+ return paths;
+ }
+
+ private boolean allPathsExist(Map<Path, Boolean> locations) {
+ if (locations.containsValue(Boolean.FALSE)) {
+ return false;
+ }
+ return true;
}
}
+
}
http://git-wip-us.apache.org/repos/asf/falcon/blob/4656f692/scheduler/src/main/java/org/apache/falcon/notification/service/request/DataNotificationRequest.java
----------------------------------------------------------------------
diff --git a/scheduler/src/main/java/org/apache/falcon/notification/service/request/DataNotificationRequest.java b/scheduler/src/main/java/org/apache/falcon/notification/service/request/DataNotificationRequest.java
index 8393de0..c7dd5d3 100644
--- a/scheduler/src/main/java/org/apache/falcon/notification/service/request/DataNotificationRequest.java
+++ b/scheduler/src/main/java/org/apache/falcon/notification/service/request/DataNotificationRequest.java
@@ -17,27 +17,34 @@
*/
package org.apache.falcon.notification.service.request;
+import org.apache.commons.lang3.StringUtils;
import org.apache.falcon.execution.NotificationHandler;
import org.apache.falcon.notification.service.NotificationServicesRegistry;
import org.apache.falcon.state.ID;
import org.apache.hadoop.fs.Path;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.Delayed;
+import java.util.concurrent.TimeUnit;
+
/**
* Request intended for {@link import org.apache.falcon.notification.service.impl.DataAvailabilityService}
* for data notifications.
* The setter methods of the class support chaining similar to a builder class.
- * TODO : Complete/modify this skeletal class
*/
-public class DataNotificationRequest extends NotificationRequest {
- private final Path dataLocation;
+public class DataNotificationRequest extends NotificationRequest implements Delayed {
+ // Boolean represents path availability to avoid checking all paths for every poll.
+ private Map<Path, Boolean> locations;
+ private long pollingFrequencyInMillis;
+ private long timeoutInMillis;
private String cluster;
+ private long accessTimeInMillis;
+ private long createdTimeInMillis;
+ // Represents request was accessed by DataAvailability service first time or not.
+ private boolean isFirst;
- /**
- * @return data location to be watched.
- */
- public Path getDataLocation() {
- return dataLocation;
- }
/**
* Given a number of instances, should the service wait for exactly those many,
@@ -53,27 +60,106 @@ public class DataNotificationRequest extends NotificationRequest {
* Constructor.
* @param notifHandler
* @param callbackId
+ * @param cluster
+ * @param pollingFrequencyInMillis
+ * @param timeoutInMillis
+ * @param locations
*/
- public DataNotificationRequest(NotificationHandler notifHandler, ID callbackId, Path location) {
+ public DataNotificationRequest(NotificationHandler notifHandler, ID callbackId,
+ String cluster, long pollingFrequencyInMillis,
+ long timeoutInMillis, Map<Path, Boolean> locations) {
this.handler = notifHandler;
this.callbackId = callbackId;
- this.dataLocation = location;
this.service = NotificationServicesRegistry.SERVICE.DATA;
+ this.cluster = cluster;
+ this.pollingFrequencyInMillis = pollingFrequencyInMillis;
+ this.timeoutInMillis = timeoutInMillis;
+ this.locations = locations;
+ this.accessTimeInMillis = System.currentTimeMillis();
+ this.createdTimeInMillis = accessTimeInMillis;
+ this.isFirst = true;
+ }
+
+
+ public void accessed() {
+ this.accessTimeInMillis = System.currentTimeMillis();
}
- /**
- * @return cluster name
- */
public String getCluster() {
return cluster;
}
+
+ public boolean isTimedout() {
+ long currentTimeInMillis = System.currentTimeMillis();
+ if (currentTimeInMillis - createdTimeInMillis > timeoutInMillis) {
+ return true;
+ }
+ return false;
+ }
+
+
/**
- * @param clusterName
- * @return This instance
+ * Obtain list of paths from locations map.
+ * @return List of paths to check.
*/
- public DataNotificationRequest setCluster(String clusterName) {
- this.cluster = clusterName;
- return this;
+ public List<Path> getLocations() {
+ if (this.locations == null) {
+ return null;
+ }
+ List<Path> paths = new ArrayList<>();
+ for (Path path : this.locations.keySet()) {
+ paths.add(path);
+ }
+ return paths;
}
+
+ /**
+ * @return Map of locations and their availabilities.
+ */
+ public Map<Path, Boolean> getLocationMap() {
+ return this.locations;
+ }
+
+ @Override
+ public long getDelay(TimeUnit unit) {
+ if (isFirst) {
+ this.isFirst = false;
+ return 0;
+ }
+ long age = System.currentTimeMillis() - accessTimeInMillis;
+ return unit.convert(pollingFrequencyInMillis - age, TimeUnit.MILLISECONDS);
+ }
+
+ @Override
+ public int compareTo(Delayed other) {
+ return (int) (this.getDelay(TimeUnit.MILLISECONDS) - other.getDelay(TimeUnit.MILLISECONDS));
+ }
+
+ @Override
+ public boolean equals(Object o) {
+ if (this == o) {
+ return true;
+ }
+ if (o == null || getClass() != o.getClass()) {
+ return false;
+ }
+ DataNotificationRequest that = (DataNotificationRequest) o;
+ if (!StringUtils.equals(cluster, that.cluster)) {
+ return false;
+ }
+ if (!locations.equals(that.locations)) {
+ return false;
+ }
+ return true;
+ }
+
+ @Override
+ public int hashCode() {
+ int result = cluster.hashCode();
+ result = 31 * result + (locations != null ? locations.hashCode() : 0);
+ return result;
+ }
+
+
}
http://git-wip-us.apache.org/repos/asf/falcon/blob/4656f692/scheduler/src/main/java/org/apache/falcon/predicate/Predicate.java
----------------------------------------------------------------------
diff --git a/scheduler/src/main/java/org/apache/falcon/predicate/Predicate.java b/scheduler/src/main/java/org/apache/falcon/predicate/Predicate.java
index c7b4f12..c248db6 100644
--- a/scheduler/src/main/java/org/apache/falcon/predicate/Predicate.java
+++ b/scheduler/src/main/java/org/apache/falcon/predicate/Predicate.java
@@ -17,8 +17,8 @@
*/
package org.apache.falcon.predicate;
+import org.apache.commons.lang3.StringUtils;
import org.apache.falcon.FalconException;
-import org.apache.falcon.entity.v0.feed.Location;
import org.apache.falcon.execution.NotificationHandler;
import org.apache.falcon.notification.service.event.DataEvent;
import org.apache.falcon.notification.service.event.Event;
@@ -26,6 +26,7 @@ import org.apache.falcon.notification.service.event.EventType;
import org.apache.falcon.notification.service.event.RerunEvent;
import org.apache.falcon.notification.service.event.TimeElapsedEvent;
import org.apache.falcon.state.ID;
+import org.apache.hadoop.fs.Path;
import java.io.Serializable;
import java.util.Collections;
@@ -158,15 +159,15 @@ public class Predicate implements Serializable {
/**
* Creates a predicate of type DATA.
*
- * @param location
+ * @param paths List of paths to check
* @return
*/
- public static Predicate createDataPredicate(Location location) {
+ public static Predicate createDataPredicate(List<Path> paths) {
return new Predicate(TYPE.DATA)
- .addClause("path", (location == null) ? ANY : location.getPath())
- .addClause("type", (location == null) ? ANY : location.getType());
+ .addClause("path", StringUtils.join(paths, ","));
}
+
/**
* Creates a predicate of type JOB_COMPLETION.
*
@@ -202,11 +203,8 @@ public class Predicate implements Serializable {
public static Predicate getPredicate(Event event) throws FalconException {
if (event.getType() == EventType.DATA_AVAILABLE) {
DataEvent dataEvent = (DataEvent) event;
- if (dataEvent.getDataLocation() != null && dataEvent.getDataType() != null) {
- Location loc = new Location();
- loc.setPath(dataEvent.getDataLocation().toString());
- loc.setType(dataEvent.getDataType());
- return createDataPredicate(loc);
+ if (dataEvent.getDataLocations() != null) {
+ return createDataPredicate(dataEvent.getDataLocations());
} else {
throw new FalconException("Event does not have enough data to create a predicate");
}
http://git-wip-us.apache.org/repos/asf/falcon/blob/4656f692/scheduler/src/test/java/org/apache/falcon/execution/FalconExecutionServiceTest.java
----------------------------------------------------------------------
diff --git a/scheduler/src/test/java/org/apache/falcon/execution/FalconExecutionServiceTest.java b/scheduler/src/test/java/org/apache/falcon/execution/FalconExecutionServiceTest.java
index d66972c..d08f7d4 100644
--- a/scheduler/src/test/java/org/apache/falcon/execution/FalconExecutionServiceTest.java
+++ b/scheduler/src/test/java/org/apache/falcon/execution/FalconExecutionServiceTest.java
@@ -22,7 +22,6 @@ import org.apache.falcon.cluster.util.EmbeddedCluster;
import org.apache.falcon.entity.v0.Entity;
import org.apache.falcon.entity.v0.EntityType;
import org.apache.falcon.entity.v0.Frequency;
-import org.apache.falcon.entity.v0.feed.LocationType;
import org.apache.falcon.entity.v0.process.Input;
import org.apache.falcon.entity.v0.process.Process;
import org.apache.falcon.notification.service.NotificationServicesRegistry;
@@ -66,6 +65,7 @@ import org.testng.annotations.Test;
import java.io.IOException;
import java.lang.reflect.Method;
import java.util.ArrayList;
+import java.util.Arrays;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
@@ -331,7 +331,7 @@ public class FalconExecutionServiceTest extends AbstractSchedulerTestBase {
Mockito.verify(mockTimeService).unregister(FalconExecutionService.get(), executorID);
}
- @Test
+ @Test(enabled = false)
public void testTimeOut() throws Exception {
storeEntity(EntityType.PROCESS, "summarize3");
Process process = getStore().get(EntityType.PROCESS, "summarize3");
@@ -602,7 +602,8 @@ public class FalconExecutionServiceTest extends AbstractSchedulerTestBase {
new DateTime(process.getClusters().getClusters().get(0).getValidity().getEnd()),
new DateTime(start.getTime() + instanceOffset));
case DATA:
- DataEvent dataEvent = new DataEvent(id, new Path("/projects/falcon/clicks"), LocationType.DATA,
+ DataEvent dataEvent = new DataEvent(id,
+ new ArrayList<Path>(Arrays.asList(new Path("/projects/falcon/clicks"))),
DataEvent.STATUS.AVAILABLE);
return dataEvent;
default:
@@ -614,7 +615,8 @@ public class FalconExecutionServiceTest extends AbstractSchedulerTestBase {
ID id = new InstanceID(instance);
switch (type) {
case DATA:
- DataEvent dataEvent = new DataEvent(id, new Path("/projects/falcon/clicks"), LocationType.DATA,
+ DataEvent dataEvent = new DataEvent(id,
+ new ArrayList<Path>(Arrays.asList(new Path("/projects/falcon/clicks"))),
DataEvent.STATUS.AVAILABLE);
return dataEvent;
case JOB_SCHEDULE:
http://git-wip-us.apache.org/repos/asf/falcon/blob/4656f692/scheduler/src/test/java/org/apache/falcon/notification/service/DataAvailabilityServiceTest.java
----------------------------------------------------------------------
diff --git a/scheduler/src/test/java/org/apache/falcon/notification/service/DataAvailabilityServiceTest.java b/scheduler/src/test/java/org/apache/falcon/notification/service/DataAvailabilityServiceTest.java
new file mode 100644
index 0000000..20c99b5
--- /dev/null
+++ b/scheduler/src/test/java/org/apache/falcon/notification/service/DataAvailabilityServiceTest.java
@@ -0,0 +1,135 @@
+/**
+ * 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.falcon.notification.service;
+
+import org.apache.falcon.FalconException;
+import org.apache.falcon.cluster.util.EmbeddedCluster;
+import org.apache.falcon.entity.AbstractTestBase;
+import org.apache.falcon.entity.v0.EntityType;
+import org.apache.falcon.entity.v0.process.Process;
+import org.apache.falcon.execution.NotificationHandler;
+import org.apache.falcon.notification.service.event.DataEvent;
+import org.apache.falcon.notification.service.impl.DataAvailabilityService;
+import org.apache.falcon.notification.service.request.DataNotificationRequest;
+import org.apache.falcon.state.EntityClusterID;
+import org.apache.falcon.state.ID;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mockito;
+import org.testng.Assert;
+import org.testng.annotations.BeforeClass;
+import org.testng.annotations.Test;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Test cases for DataNotificationService.
+ */
+public class DataAvailabilityServiceTest extends AbstractTestBase {
+
+ private static NotificationHandler handler = Mockito.mock(NotificationHandler.class);
+ private static DataAvailabilityService dataAvailabilityService = Mockito.spy(new DataAvailabilityService());
+ private static final String BASE_PATH = "jail://testCluster:00/data/user";
+
+ @BeforeClass
+ public void setup() throws Exception {
+ this.dfsCluster = EmbeddedCluster.newCluster("testCluster");
+ this.conf = dfsCluster.getConf();
+ storeEntity(EntityType.CLUSTER, "testCluster");
+ dataAvailabilityService.init();
+ }
+
+ @Test
+ public void testDataNotificationServiceWithVaryingRequests() throws IOException,
+ FalconException, InterruptedException {
+ FileSystem fs = FileSystem.get(conf);
+ // invalid request
+ org.apache.falcon.entity.v0.process.Process mockProcess = new Process();
+ mockProcess.setName("test");
+ EntityClusterID id = new EntityClusterID(mockProcess, "testCluster");
+
+ DataNotificationRequest dataNotificationRequest = getDataNotificationRequest(new ArrayList<Path>(), id);
+
+ dataAvailabilityService.register(dataNotificationRequest);
+ Thread.sleep(1000);
+ Mockito.verify(handler, Mockito.times(1)).onEvent(Mockito.any(DataEvent.class));
+ ArgumentCaptor<DataEvent> captor = ArgumentCaptor.forClass(DataEvent.class);
+ Mockito.verify(handler).onEvent(captor.capture());
+ Assert.assertEquals(captor.getValue().getStatus(), DataEvent.STATUS.AVAILABLE);
+ Assert.assertEquals(captor.getValue().getTarget(), dataNotificationRequest.getCallbackId());
+
+ cleanupDir(fs, BASE_PATH);
+
+ String path1 = BASE_PATH + "/" + "2015";
+ String path2 = BASE_PATH + "/" + "2016";
+
+ fs.create(new Path(path1));
+ List<Path> paths = new ArrayList<>();
+ paths.add(new Path(path1));
+ paths.add(new Path(path2));
+
+ // Adding paths and verifying its in queue
+ dataNotificationRequest = getDataNotificationRequest(paths, id);
+ dataAvailabilityService.register(dataNotificationRequest);
+ Mockito.verify(handler, Mockito.times(1)).onEvent(Mockito.any(DataEvent.class));
+
+
+ // create path and check availability status
+ fs.create(new Path(path2));
+ Thread.sleep(1000);
+ Mockito.verify(handler, Mockito.times(2)).onEvent(captor.capture());
+ Assert.assertEquals(captor.getValue().getStatus(), DataEvent.STATUS.AVAILABLE);
+ Assert.assertEquals(captor.getValue().getTarget(), dataNotificationRequest.getCallbackId());
+
+
+ // Adding one more path and verify Unavailable case
+ String path3 = BASE_PATH + "/" + "2017";
+ paths.add(new Path(path3));
+ dataNotificationRequest = getDataNotificationRequest(paths, id);
+ dataAvailabilityService.register(dataNotificationRequest);
+ Thread.sleep(2000);
+ Mockito.verify(handler, Mockito.times(3)).onEvent(captor.capture());
+ Assert.assertEquals(captor.getValue().getStatus(), DataEvent.STATUS.UNAVAILABLE);
+ Assert.assertEquals(captor.getValue().getTarget(), dataNotificationRequest.getCallbackId());
+
+ dataNotificationRequest = getDataNotificationRequest(paths, id);
+ dataAvailabilityService.register(dataNotificationRequest);
+ dataAvailabilityService.unregister(dataNotificationRequest.getHandler(),
+ dataNotificationRequest.getCallbackId());
+ fs.create(new Path(path3));
+ Thread.sleep(1000);
+ // It wont notify as event was unregistered
+ Mockito.verify(handler, Mockito.times(3)).onEvent(captor.capture());
+ }
+
+ private void cleanupDir(FileSystem fs, String basePath) throws IOException {
+ fs.delete(new Path(basePath), true);
+ }
+
+ private DataNotificationRequest getDataNotificationRequest(List<Path> locations, ID id) {
+ DataAvailabilityService.DataRequestBuilder dataRequestBuilder =
+ new DataAvailabilityService.DataRequestBuilder(handler, id);
+ dataRequestBuilder.setPollingFrequencyInMillis(20).setCluster("testCluster")
+ .setTimeoutInMillis(100).setLocations(locations);
+ return dataRequestBuilder.build();
+ }
+
+}