/**
* 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.entity;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.codec.binary.Hex;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.falcon.FalconException;
import org.apache.falcon.Tag;
import org.apache.falcon.entity.WorkflowNameBuilder.WorkflowName;
import org.apache.falcon.entity.store.ConfigurationStore;
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.SchemaHelper;
import org.apache.falcon.entity.v0.feed.Cluster;
import org.apache.falcon.entity.v0.feed.ClusterType;
import org.apache.falcon.entity.v0.feed.Feed;
import org.apache.falcon.entity.v0.process.*;
import org.apache.falcon.entity.v0.process.Process;
import org.apache.falcon.hadoop.HadoopClientFactory;
import org.apache.falcon.util.DeploymentUtil;
import org.apache.falcon.util.RuntimeProperties;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathFilter;
import java.io.IOException;
import java.lang.reflect.Method;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
/**
* Helper to get entity object.
*/
public final class EntityUtil {
private static final long MINUTE_IN_MS = 60000L;
private static final long HOUR_IN_MS = 3600000L;
private static final long DAY_IN_MS = 86400000L;
private static final long MONTH_IN_MS = 2592000000L;
public static final String PROCESS_CHECKSUM_FILE = "checksums";
public static final String PROCESS_USER_DIR = "user";
public static final String PROCESS_USERLIB_DIR = "userlib";
public static final String SUCCEEDED_FILE_NAME = "_SUCCESS";
private EntityUtil() {}
public static <T extends Entity> T getEntity(EntityType type, String entityName) throws FalconException {
ConfigurationStore configStore = ConfigurationStore.get();
T entity = configStore.get(type, entityName);
if (entity == null) {
throw new EntityNotRegisteredException(entityName + " (" + type + ") not found");
}
return entity;
}
public static <T extends Entity> T getEntity(String type, String entityName) throws FalconException {
EntityType entityType;
try {
entityType = EntityType.valueOf(type.toUpperCase());
} catch (IllegalArgumentException e) {
throw new FalconException("Invalid entity type: " + type, e);
}
return getEntity(entityType, entityName);
}
public static TimeZone getTimeZone(String tzId) {
if (tzId == null) {
throw new IllegalArgumentException("Invalid TimeZone: Cannot be null.");
}
TimeZone tz = TimeZone.getTimeZone(tzId);
if (!tzId.equals("GMT") && tz.getID().equals("GMT")) {
throw new IllegalArgumentException("Invalid TimeZone: " + tzId);
}
return tz;
}
public static Date getEndTime(Entity entity, String cluster) {
if (entity.getEntityType() == EntityType.PROCESS) {
return getEndTime((Process) entity, cluster);
} else {
return getEndTime((Feed) entity, cluster);
}
}
public static Date parseDateUTC(String dateStr) throws FalconException {
try {
return SchemaHelper.parseDateUTC(dateStr);
} catch (Exception e) {
throw new FalconException(e);
}
}
public static Date getStartTime(Entity entity, String cluster) {
if (entity.getEntityType() == EntityType.PROCESS) {
return getStartTime((Process) entity, cluster);
} else {
return getStartTime((Feed) entity, cluster);
}
}
public static Date getEndTime(Process process, String cluster) {
org.apache.falcon.entity.v0.process.Cluster processCluster = ProcessHelper.getCluster(process, cluster);
return processCluster.getValidity().getEnd();
}
public static Date getStartTime(Process process, String cluster) {
org.apache.falcon.entity.v0.process.Cluster processCluster = ProcessHelper.getCluster(process, cluster);
return processCluster.getValidity().getStart();
}
public static Date getEndTime(Feed feed, String cluster) {
org.apache.falcon.entity.v0.feed.Cluster clusterDef = FeedHelper.getCluster(feed, cluster);
return clusterDef.getValidity().getEnd();
}
public static Date getStartTime(Feed feed, String cluster) {
org.apache.falcon.entity.v0.feed.Cluster clusterDef = FeedHelper.getCluster(feed, cluster);
return clusterDef.getValidity().getStart();
}
public static int getParallel(Entity entity) {
if (entity.getEntityType() == EntityType.PROCESS) {
return getParallel((Process) entity);
} else {
return getParallel((Feed) entity);
}
}
public static void setStartDate(Entity entity, String cluster, Date startDate) {
if (entity.getEntityType() == EntityType.PROCESS) {
setStartDate((Process) entity, cluster, startDate);
} else {
setStartDate((Feed) entity, cluster, startDate);
}
}
public static void setEndTime(Entity entity, String cluster, Date endDate) {
if (entity.getEntityType() == EntityType.PROCESS) {
setEndTime((Process) entity, cluster, endDate);
} else {
setEndTime((Feed) entity, cluster, endDate);
}
}
public static void setParallel(Entity entity, int parallel) {
if (entity.getEntityType() == EntityType.PROCESS) {
setParallel((Process) entity, parallel);
} else {
setParallel((Feed) entity, parallel);
}
}
public static int getParallel(Process process) {
return process.getParallel();
}
public static void setStartDate(Process process, String cluster, Date startDate) {
org.apache.falcon.entity.v0.process.Cluster processCluster = ProcessHelper.getCluster(process, cluster);
processCluster.getValidity().setStart(startDate);
}
public static void setParallel(Process process, int parallel) {
process.setParallel(parallel);
}
public static void setEndTime(Process process, String cluster, Date endDate) {
org.apache.falcon.entity.v0.process.Cluster processCluster = ProcessHelper.getCluster(process, cluster);
processCluster.getValidity().setEnd(endDate);
}
public static int getParallel(Feed feed) {
return 1;
}
public static void setStartDate(Feed feed, String cluster, Date startDate) {
org.apache.falcon.entity.v0.feed.Cluster clusterDef = FeedHelper.getCluster(feed, cluster);
clusterDef.getValidity().setStart(startDate);
}
public static void setEndTime(Feed feed, String cluster, Date endDate) {
org.apache.falcon.entity.v0.feed.Cluster clusterDef = FeedHelper.getCluster(feed, cluster);
clusterDef.getValidity().setStart(endDate);
}
public static void setParallel(Feed feed, int parallel) {
}
public static Frequency getFrequency(Entity entity) {
if (entity.getEntityType() == EntityType.PROCESS) {
return getFrequency((Process) entity);
} else {
return getFrequency((Feed) entity);
}
}
public static Frequency getFrequency(Process process) {
return process.getFrequency();
}
public static Frequency getFrequency(Feed feed) {
return feed.getFrequency();
}
public static TimeZone getTimeZone(Entity entity) {
if (entity.getEntityType() == EntityType.PROCESS) {
return getTimeZone((Process) entity);
} else {
return getTimeZone((Feed) entity);
}
}
public static TimeZone getTimeZone(Process process) {
return process.getTimezone();
}
public static TimeZone getTimeZone(Feed feed) {
return feed.getTimezone();
}
public static Date getNextStartTime(Date startTime, Frequency frequency, TimeZone timezone, Date now) {
if (startTime.after(now)) {
return startTime;
}
Calendar startCal = Calendar.getInstance(timezone);
startCal.setTime(startTime);
int count = 0;
switch (frequency.getTimeUnit()) {
case months:
count = (int) ((now.getTime() - startTime.getTime()) / MONTH_IN_MS);
break;
case days:
count = (int) ((now.getTime() - startTime.getTime()) / DAY_IN_MS);
break;
case hours:
count = (int) ((now.getTime() - startTime.getTime()) / HOUR_IN_MS);
break;
case minutes:
count = (int) ((now.getTime() - startTime.getTime()) / MINUTE_IN_MS);
break;
default:
}
final int freq = frequency.getFrequencyAsInt();
if (count > 2) {
startCal.add(frequency.getTimeUnit().getCalendarUnit(), ((count - 2) / freq) * freq);
}
while (startCal.getTime().before(now)) {
startCal.add(frequency.getTimeUnit().getCalendarUnit(), freq);
}
return startCal.getTime();
}
public static int getInstanceSequence(Date startTime, Frequency frequency, TimeZone tz, Date instanceTime) {
if (startTime.after(instanceTime)) {
return -1;
}
Calendar startCal = Calendar.getInstance(tz);
startCal.setTime(startTime);
int count = 0;
switch (frequency.getTimeUnit()) {
case months:
count = (int) ((instanceTime.getTime() - startTime.getTime()) / MONTH_IN_MS);
break;
case days:
count = (int) ((instanceTime.getTime() - startTime.getTime()) / DAY_IN_MS);
break;
case hours:
count = (int) ((instanceTime.getTime() - startTime.getTime()) / HOUR_IN_MS);
break;
case minutes:
count = (int) ((instanceTime.getTime() - startTime.getTime()) / MINUTE_IN_MS);
break;
default:
}
final int freq = frequency.getFrequencyAsInt();
if (count > 2) {
startCal.add(frequency.getTimeUnit().getCalendarUnit(), (count / freq) * freq);
count = (count / freq);
} else {
count = 0;
}
while (startCal.getTime().before(instanceTime)) {
startCal.add(frequency.getTimeUnit().getCalendarUnit(), freq);
count++;
}
return count + 1;
}
public static String md5(Entity entity) throws FalconException {
return new String(Hex.encodeHex(DigestUtils.md5(stringOf(entity))));
}
public static boolean equals(Entity lhs, Entity rhs) throws FalconException {
return equals(lhs, rhs, null);
}
public static boolean equals(Entity lhs, Entity rhs, String[] filterProps) throws FalconException {
if (lhs == null && rhs == null) {
return true;
}
if (lhs == null || rhs == null) {
return false;
}
if (lhs.equals(rhs)) {
String lhsString = stringOf(lhs, filterProps);
String rhsString = stringOf(rhs, filterProps);
return lhsString.equals(rhsString);
} else {
return false;
}
}
public static String stringOf(Entity entity) throws FalconException {
return stringOf(entity, null);
}
private static String stringOf(Entity entity, String[] filterProps) throws FalconException {
Map<String, String> map = new HashMap<String, String>();
mapToProperties(entity, null, map, filterProps);
List<String> keyList = new ArrayList<String>(map.keySet());
Collections.sort(keyList);
StringBuilder builer = new StringBuilder();
for (String key : keyList) {
builer.append(key).append('=').append(map.get(key)).append('\n');
}
return builer.toString();
}
@SuppressWarnings("rawtypes")
private static void mapToProperties(Object obj, String name, Map<String, String> propMap, String[] filterProps)
throws FalconException {
if (obj == null) {
return;
}
if (filterProps != null && name != null) {
for (String filter : filterProps) {
if (name.matches(filter.replace(".", "\\.").replace("[", "\\[").replace("]", "\\]"))) {
return;
}
}
}
if (Date.class.isAssignableFrom(obj.getClass())) {
propMap.put(name, SchemaHelper.formatDateUTC((Date) obj));
} else if (obj.getClass().getPackage().getName().equals("java.lang")) {
propMap.put(name, String.valueOf(obj));
} else if (TimeZone.class.isAssignableFrom(obj.getClass())) {
propMap.put(name, ((TimeZone) obj).getID());
} else if (Enum.class.isAssignableFrom(obj.getClass())) {
propMap.put(name, ((Enum) obj).name());
} else if (List.class.isAssignableFrom(obj.getClass())) {
List list = (List) obj;
for (int index = 0; index < list.size(); index++) {
mapToProperties(list.get(index), name + "[" + index + "]", propMap, filterProps);
}
} else {
try {
Method method = obj.getClass().getDeclaredMethod("toString");
propMap.put(name, (String) method.invoke(obj));
} catch (NoSuchMethodException e) {
try {
Map map = PropertyUtils.describe(obj);
for (Object entry : map.entrySet()) {
String key = (String)((Map.Entry)entry).getKey();
if (!key.equals("class")) {
mapToProperties(map.get(key), name != null ? name + "." + key : key, propMap,
filterProps);
}
}
} catch (Exception e1) {
throw new FalconException(e1);
}
} catch (Exception e) {
throw new FalconException(e);
}
}
}
public static WorkflowName getWorkflowName(Tag tag, List<String> suffixes,
Entity entity) {
WorkflowNameBuilder<Entity> builder = new WorkflowNameBuilder<Entity>(
entity);
builder.setTag(tag);
builder.setSuffixes(suffixes);
return builder.getWorkflowName();
}
public static WorkflowName getWorkflowName(Tag tag, Entity entity) {
return getWorkflowName(tag, null, entity);
}
public static WorkflowName getWorkflowName(Entity entity) {
return getWorkflowName(null, null, entity);
}
public static String getWorkflowNameSuffix(String workflowName,
Entity entity) throws FalconException {
WorkflowNameBuilder<Entity> builder = new WorkflowNameBuilder<Entity>(
entity);
return builder.getWorkflowSuffixes(workflowName).replaceAll("_", "");
}
public static Tag getWorkflowNameTag(String workflowName, Entity entity) {
WorkflowNameBuilder<Entity> builder = new WorkflowNameBuilder<Entity>(
entity);
return builder.getWorkflowTag(workflowName);
}
public static <T extends Entity> T getClusterView(T entity, String clusterName) {
switch (entity.getEntityType()) {
case CLUSTER:
return entity;
case FEED:
Feed feed = (Feed) entity.copy();
Cluster feedCluster = FeedHelper.getCluster(feed, clusterName);
Iterator<Cluster> itr = feed.getClusters().getClusters().iterator();
while (itr.hasNext()) {
Cluster cluster = itr.next();
//In addition to retaining the required clster, retain the sources clusters if this is the target
// cluster
//1. Retain cluster if cluster n
if (!(cluster.getName().equals(clusterName)
|| (feedCluster.getType() == ClusterType.TARGET
&& cluster.getType() == ClusterType.SOURCE))) {
itr.remove();
}
}
return (T) feed;
case PROCESS:
Process process = (Process) entity.copy();
Iterator<org.apache.falcon.entity.v0.process.Cluster> procItr =
process.getClusters().getClusters().iterator();
while (procItr.hasNext()) {
org.apache.falcon.entity.v0.process.Cluster cluster = procItr.next();
if (!cluster.getName().equals(clusterName)) {
procItr.remove();
}
}
return (T) process;
default:
}
throw new UnsupportedOperationException("Not supported for entity type " + entity.getEntityType());
}
public static Set<String> getClustersDefined(Entity entity) {
Set<String> clusters = new HashSet<String>();
switch (entity.getEntityType()) {
case CLUSTER:
clusters.add(entity.getName());
break;
case FEED:
Feed feed = (Feed) entity;
for (Cluster cluster : feed.getClusters().getClusters()) {
clusters.add(cluster.getName());
}
break;
case PROCESS:
Process process = (Process) entity;
for (org.apache.falcon.entity.v0.process.Cluster cluster : process.getClusters().getClusters()) {
clusters.add(cluster.getName());
}
break;
default:
}
return clusters;
}
public static Set<String> getClustersDefinedInColos(Entity entity) {
Set<String> entityClusters = EntityUtil.getClustersDefined(entity);
if (DeploymentUtil.isEmbeddedMode()) {
return entityClusters;
}
Set<String> myClusters = DeploymentUtil.getCurrentClusters();
Set<String> applicableClusters = new HashSet<String>();
for (String cluster : entityClusters) {
if (myClusters.contains(cluster)) {
applicableClusters.add(cluster);
}
}
return applicableClusters;
}
public static Retry getRetry(Entity entity) throws FalconException {
switch (entity.getEntityType()) {
case FEED:
if (!RuntimeProperties.get()
.getProperty("feed.retry.allowed", "true")
.equalsIgnoreCase("true")) {
return null;
}
Retry retry = new Retry();
retry.setAttempts(Integer.parseInt(RuntimeProperties.get()
.getProperty("feed.retry.attempts", "3")));
retry.setDelay(new Frequency(RuntimeProperties.get().getProperty(
"feed.retry.frequency", "minutes(5)")));
retry.setPolicy(PolicyType.fromValue(RuntimeProperties.get()
.getProperty("feed.retry.policy", "exp-backoff")));
return retry;
case PROCESS:
Process process = (Process) entity;
return process.getRetry();
default:
throw new FalconException("Cannot create Retry for entity:" + entity.getName());
}
}
//Staging path that stores scheduler configs like oozie coord/bundle xmls, parent workflow xml
//Each entity update creates a new staging path and creates staging path/_SUCCESS when update is complete
//Base staging path is the base path for all staging dirs
public static Path getBaseStagingPath(org.apache.falcon.entity.v0.cluster.Cluster cluster, Entity entity) {
return new Path(ClusterHelper.getLocation(cluster, "staging"),
"falcon/workflows/" + entity.getEntityType().name().toLowerCase() + "/" + entity.getName());
}
//Creates new staging path for entity schedule/update
public static Path getNewStagingPath(org.apache.falcon.entity.v0.cluster.Cluster cluster, Entity entity) {
return new Path(getBaseStagingPath(cluster, entity), String.valueOf(System.currentTimeMillis()));
}
private static Path getStagingPath(org.apache.falcon.entity.v0.cluster.Cluster cluster, Path path)
throws FalconException {
try {
FileSystem fs = HadoopClientFactory.get().createFileSystem(ClusterHelper.getConfiguration(cluster));
FileStatus latest = null;
FileStatus[] files = fs.globStatus(path, new PathFilter() {
@Override
public boolean accept(Path path) {
if (path.getName().equals("logs")) {
return false;
}
return true;
}
});
if (files == null || files.length == 0) {
return null;
}
for (FileStatus file : files) {
if (latest == null || latest.getModificationTime() < file.getModificationTime()) {
latest = file;
}
}
return latest.getPath();
} catch (IOException e) {
throw new FalconException(e);
}
}
//Returns latest staging path - includes incomplete staging paths as well (updates are not complete)
public static Path getLatestStagingPath(org.apache.falcon.entity.v0.cluster.Cluster cluster, Entity entity)
throws FalconException {
return getStagingPath(cluster, new Path(getBaseStagingPath(cluster, entity), "*"));
}
//Returns latest staging path for which update is complete (latest that contains _SUCCESS)
public static Path getLastCommittedStagingPath(org.apache.falcon.entity.v0.cluster.Cluster cluster, Entity entity)
throws FalconException {
Path stagingPath = getStagingPath(cluster, new Path(getBaseStagingPath(cluster, entity),
"*/" + SUCCEEDED_FILE_NAME));
return stagingPath == null ? null : stagingPath.getParent();
}
public static LateProcess getLateProcess(Entity entity)
throws FalconException {
switch (entity.getEntityType()) {
case FEED:
if (!RuntimeProperties.get().getProperty("feed.late.allowed", "true").equalsIgnoreCase("true")) {
return null;
}
LateProcess lateProcess = new LateProcess();
lateProcess.setDelay(new Frequency(RuntimeProperties.get().getProperty("feed.late.frequency", "hours(3)")));
lateProcess.setPolicy(
PolicyType.fromValue(RuntimeProperties.get().getProperty("feed.late.policy", "exp-backoff")));
LateInput lateInput = new LateInput();
lateInput.setInput(entity.getName());
//TODO - Assuming the late workflow is not used
lateInput.setWorkflowPath("ignore.xml");
lateProcess.getLateInputs().add(lateInput);
return lateProcess;
case PROCESS:
Process process = (Process) entity;
return process.getLateProcess();
default:
throw new FalconException("Cannot create Late Process for entity:" + entity.getName());
}
}
public static Path getLogPath(org.apache.falcon.entity.v0.cluster.Cluster cluster, Entity entity) {
return new Path(getBaseStagingPath(cluster, entity), "logs");
}
public static String fromUTCtoURIDate(String utc) throws FalconException {
DateFormat utcFormat = new SimpleDateFormat(
"yyyy'-'MM'-'dd'T'HH':'mm'Z'");
Date utcDate;
try {
utcDate = utcFormat.parse(utc);
} catch (ParseException e) {
throw new FalconException("Unable to parse utc date:", e);
}
DateFormat uriFormat = new SimpleDateFormat("yyyy'-'MM'-'dd'-'HH'-'mm");
return uriFormat.format(utcDate);
}
public static boolean responsibleFor(String colo) {
return DeploymentUtil.isEmbeddedMode() || (!DeploymentUtil.isPrism()
&& colo.equals(DeploymentUtil.getCurrentColo()));
}
}