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Declarative Machine Learning
/*
* 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.sysml.api;
import java.util.ArrayList;
import org.apache.sysml.api.monitoring.Location;
import org.apache.sysml.parser.Expression;
import org.apache.sysml.parser.LanguageException;
import org.apache.sysml.runtime.instructions.Instruction;
import org.apache.sysml.runtime.instructions.spark.SPInstruction;
/**
* The purpose of this proxy is to shield systemml internals from direct access to MLContext
* which would try to load spark libraries and hence fail if these are not available. This
* indirection is much more efficient than catching NoClassDefFoundErrors for every access
* to MLContext (e.g., on each recompile).
*
*/
public class MLContextProxy
{
private static boolean _active = false;
/**
*
* @param flag
*/
public static void setActive(boolean flag) {
_active = flag;
}
/**
*
* @return
*/
public static boolean isActive() {
return _active;
}
/**
*
* @param tmp
*/
public static ArrayList performCleanupAfterRecompilation(ArrayList tmp)
{
if(MLContext.getActiveMLContext() != null) {
return MLContext.getActiveMLContext().performCleanupAfterRecompilation(tmp);
}
return tmp;
}
/**
*
* @param source
* @param targetname
* @throws LanguageException
*/
public static void setAppropriateVarsForRead(Expression source, String targetname)
throws LanguageException
{
MLContext mlContext = MLContext.getActiveMLContext();
if(mlContext != null) {
mlContext.setAppropriateVarsForRead(source, targetname);
}
}
public static MLContext getActiveMLContext() {
return MLContext.getActiveMLContext();
}
public static void setInstructionForMonitoring(Instruction inst) {
Location loc = inst.getLocation();
MLContext mlContext = MLContext.getActiveMLContext();
if(loc != null && mlContext != null && mlContext.getMonitoringUtil() != null) {
mlContext.getMonitoringUtil().setInstructionLocation(loc, inst);
}
}
public static void addRDDForInstructionForMonitoring(SPInstruction inst, Integer rddID) {
MLContext mlContext = MLContext.getActiveMLContext();
if(mlContext != null && mlContext.getMonitoringUtil() != null) {
mlContext.getMonitoringUtil().addRDDForInstruction(inst, rddID);
}
}
}