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org.apache.hadoop.hive.ql.exec.FunctionTask Maven / Gradle / Ivy
/**
* 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.hadoop.hive.ql.exec;
import static org.apache.hadoop.util.StringUtils.stringifyException;
import java.io.IOException;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.hive.common.JavaUtils;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.metastore.api.Function;
import org.apache.hadoop.hive.metastore.api.PrincipalType;
import org.apache.hadoop.hive.metastore.api.ResourceType;
import org.apache.hadoop.hive.metastore.api.ResourceUri;
import org.apache.hadoop.hive.ql.DriverContext;
import org.apache.hadoop.hive.ql.QueryPlan;
import org.apache.hadoop.hive.ql.exec.FunctionUtils.UDFClassType;
import org.apache.hadoop.hive.ql.metadata.Hive;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.ql.plan.CreateFunctionDesc;
import org.apache.hadoop.hive.ql.plan.DropFunctionDesc;
import org.apache.hadoop.hive.ql.plan.CreateMacroDesc;
import org.apache.hadoop.hive.ql.plan.DropMacroDesc;
import org.apache.hadoop.hive.ql.plan.FunctionWork;
import org.apache.hadoop.hive.ql.plan.api.StageType;
import org.apache.hadoop.hive.ql.session.SessionState;
import org.apache.hadoop.util.StringUtils;
/**
* FunctionTask.
*
*/
public class FunctionTask extends Task {
private static final long serialVersionUID = 1L;
private static transient final Log LOG = LogFactory.getLog(FunctionTask.class);
transient HiveConf conf;
public FunctionTask() {
super();
}
@Override
public void initialize(HiveConf conf, QueryPlan queryPlan, DriverContext ctx) {
super.initialize(conf, queryPlan, ctx);
this.conf = conf;
}
@Override
public int execute(DriverContext driverContext) {
CreateFunctionDesc createFunctionDesc = work.getCreateFunctionDesc();
if (createFunctionDesc != null) {
if (createFunctionDesc.isTemp()) {
return createTemporaryFunction(createFunctionDesc);
} else {
try {
return createPermanentFunction(Hive.get(conf), createFunctionDesc);
} catch (Exception e) {
setException(e);
LOG.error(stringifyException(e));
return 1;
}
}
}
DropFunctionDesc dropFunctionDesc = work.getDropFunctionDesc();
if (dropFunctionDesc != null) {
if (dropFunctionDesc.isTemp()) {
return dropTemporaryFunction(dropFunctionDesc);
} else {
try {
return dropPermanentFunction(Hive.get(conf), dropFunctionDesc);
} catch (Exception e) {
setException(e);
LOG.error(stringifyException(e));
return 1;
}
}
}
CreateMacroDesc createMacroDesc = work.getCreateMacroDesc();
if (createMacroDesc != null) {
return createMacro(createMacroDesc);
}
DropMacroDesc dropMacroDesc = work.getDropMacroDesc();
if (dropMacroDesc != null) {
return dropMacro(dropMacroDesc);
}
return 0;
}
private int createPermanentFunction(Hive db, CreateFunctionDesc createFunctionDesc)
throws HiveException, IOException {
String[] qualifiedNameParts = FunctionUtils.getQualifiedFunctionNameParts(
createFunctionDesc.getFunctionName());
String dbName = qualifiedNameParts[0];
String funcName = qualifiedNameParts[1];
String registeredName = FunctionUtils.qualifyFunctionName(funcName, dbName);
String className = createFunctionDesc.getClassName();
boolean addedToRegistry = false;
try {
// For permanent functions, check for any resources from local filesystem.
checkLocalFunctionResources(db, createFunctionDesc.getResources());
// Add any required resources
addFunctionResources(createFunctionDesc.getResources());
// UDF class should exist
Class udfClass = getUdfClass(createFunctionDesc);
if (FunctionUtils.getUDFClassType(udfClass) == UDFClassType.UNKNOWN) {
console.printError("FAILED: Class " + createFunctionDesc.getClassName()
+ " does not implement UDF, GenericUDF, or UDAF");
return 1;
}
// TODO: There should be a registerPermanentFunction()
addedToRegistry = FunctionRegistry.registerTemporaryFunction(registeredName, udfClass);
if (!addedToRegistry) {
console.printError("Failed to register " + registeredName
+ " using class " + createFunctionDesc.getClassName());
return 1;
}
// Add to metastore
Function func = new Function(
funcName,
dbName,
className,
SessionState.get().getUserName(),
PrincipalType.USER,
(int) (System.currentTimeMillis() / 1000),
org.apache.hadoop.hive.metastore.api.FunctionType.JAVA,
createFunctionDesc.getResources()
);
db.createFunction(func);
return 0;
} catch (ClassNotFoundException e) {
console.printError("FAILED: Class " + createFunctionDesc.getClassName() + " not found");
LOG.info("create function: " + StringUtils.stringifyException(e));
if (addedToRegistry) {
FunctionRegistry.unregisterTemporaryUDF(registeredName);
}
return 1;
}
}
private int createTemporaryFunction(CreateFunctionDesc createFunctionDesc) {
try {
// Add any required resources
addFunctionResources(createFunctionDesc.getResources());
Class udfClass = getUdfClass(createFunctionDesc);
boolean registered = FunctionRegistry.registerTemporaryFunction(
createFunctionDesc.getFunctionName(),
udfClass);
if (registered) {
return 0;
}
console.printError("FAILED: Class " + createFunctionDesc.getClassName()
+ " does not implement UDF, GenericUDF, or UDAF");
return 1;
} catch (HiveException e) {
console.printError("FAILED: " + e.toString());
LOG.info("create function: " + StringUtils.stringifyException(e));
return 1;
} catch (ClassNotFoundException e) {
console.printError("FAILED: Class " + createFunctionDesc.getClassName() + " not found");
LOG.info("create function: " + StringUtils.stringifyException(e));
return 1;
}
}
private int createMacro(CreateMacroDesc createMacroDesc) {
FunctionRegistry.registerTemporaryMacro(
createMacroDesc.getMacroName(),
createMacroDesc.getBody(),
createMacroDesc.getColNames(),
createMacroDesc.getColTypes());
return 0;
}
private int dropMacro(DropMacroDesc dropMacroDesc) {
try {
FunctionRegistry.unregisterTemporaryUDF(dropMacroDesc
.getMacroName());
return 0;
} catch (HiveException e) {
LOG.info("drop macro: " + StringUtils.stringifyException(e));
return 1;
}
}
private int dropPermanentFunction(Hive db, DropFunctionDesc dropFunctionDesc) {
try {
String[] qualifiedNameParts = FunctionUtils.getQualifiedFunctionNameParts(
dropFunctionDesc.getFunctionName());
String dbName = qualifiedNameParts[0];
String funcName = qualifiedNameParts[1];
String registeredName = FunctionUtils.qualifyFunctionName(funcName, dbName);
// TODO: there should be a unregisterPermanentUDF()
FunctionRegistry.unregisterTemporaryUDF(registeredName);
db.dropFunction(dbName, funcName);
return 0;
} catch (Exception e) {
LOG.info("drop function: " + StringUtils.stringifyException(e));
console.printError("FAILED: error during drop function: " + StringUtils.stringifyException(e));
return 1;
}
}
private int dropTemporaryFunction(DropFunctionDesc dropFunctionDesc) {
try {
FunctionRegistry.unregisterTemporaryUDF(dropFunctionDesc
.getFunctionName());
return 0;
} catch (HiveException e) {
LOG.info("drop function: " + StringUtils.stringifyException(e));
return 1;
}
}
private void checkLocalFunctionResources(Hive db, List resources)
throws HiveException {
// If this is a non-local warehouse, then adding resources from the local filesystem
// may mean that other clients will not be able to access the resources.
// So disallow resources from local filesystem in this case.
if (resources != null && resources.size() > 0) {
try {
String localFsScheme = FileSystem.getLocal(db.getConf()).getUri().getScheme();
String configuredFsScheme = FileSystem.get(db.getConf()).getUri().getScheme();
if (configuredFsScheme.equals(localFsScheme)) {
// Configured warehouse FS is local, don't need to bother checking.
return;
}
for (ResourceUri res : resources) {
String resUri = res.getUri();
if (!SessionState.canDownloadResource(resUri)) {
throw new HiveException("Hive warehouse is non-local, but "
+ res.getUri() + " specifies file on local filesystem. "
+ "Resources on non-local warehouse should specify a non-local scheme/path");
}
}
} catch (HiveException e) {
throw e;
} catch (Exception e) {
LOG.error(e);
throw new HiveException(e);
}
}
}
private static SessionState.ResourceType getResourceType(ResourceType rt) throws HiveException {
switch (rt) {
case JAR:
return SessionState.ResourceType.JAR;
case FILE:
return SessionState.ResourceType.FILE;
case ARCHIVE:
return SessionState.ResourceType.ARCHIVE;
default:
throw new HiveException("Unexpected resource type " + rt);
}
}
public static void addFunctionResources(List resources) throws HiveException {
if (resources != null) {
for (ResourceUri res : resources) {
String addedResource =
SessionState.get().add_resource(getResourceType(res.getResourceType()), res.getUri());
if (addedResource == null) {
throw new HiveException("Unable to load " + res.getResourceType() + " " + res.getUri());
}
}
}
}
private Class getUdfClass(CreateFunctionDesc desc) throws ClassNotFoundException {
// get the session specified class loader from SessionState
ClassLoader classLoader = Utilities.getSessionSpecifiedClassLoader();
return Class.forName(desc.getClassName(), true, classLoader);
}
@Override
public StageType getType() {
return StageType.FUNC;
}
@Override
public String getName() {
return "FUNCTION";
}
}
