org.apache.solr.client.solrj.io.stream.metrics.Metric 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.solr.client.solrj.io.stream.metrics;
import java.io.IOException;
import java.util.UUID;
import org.apache.solr.client.solrj.io.Tuple;
import org.apache.solr.client.solrj.io.stream.expr.Explanation;
import org.apache.solr.client.solrj.io.stream.expr.Explanation.ExpressionType;
import org.apache.solr.client.solrj.io.stream.expr.Expressible;
import org.apache.solr.client.solrj.io.stream.expr.StreamFactory;
public abstract class Metric implements Expressible {
private UUID metricNodeId = UUID.randomUUID();
private String functionName;
private String identifier;
public String getFunctionName(){
return functionName;
}
public void setFunctionName(String functionName){
this.functionName = functionName;
}
public String getIdentifier(){
return identifier;
}
public void setIdentifier(String identifier){
this.identifier = identifier;
}
public void setIdentifier(String ... identifierParts){
StringBuilder sb = new StringBuilder();
for(String part : identifierParts){
sb.append(part);
}
this.identifier = sb.toString();
}
@Override
public Explanation toExplanation(StreamFactory factory) throws IOException {
return new Explanation(getMetricNodeId().toString())
.withFunctionName(functionName)
.withImplementingClass(getClass().getName())
.withExpression(toExpression(factory).toString())
.withExpressionType(ExpressionType.METRIC);
}
public UUID getMetricNodeId(){
return metricNodeId;
}
public abstract Number getValue();
public abstract void update(Tuple tuple);
public abstract Metric newInstance();
public abstract String[] getColumns();
}