161 lines
4.7 KiB
Java
161 lines
4.7 KiB
Java
/**
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* Copyright (C) 2007 - 2016 52°North Initiative for Geospatial Open Source
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* Software GmbH
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.n52.wps.server;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.Map;
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import net.opengis.wps.x100.ProcessDescriptionType;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.n52.wps.PropertyDocument.Property;
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import org.n52.wps.algorithm.annotation.Algorithm;
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import org.n52.wps.commons.WPSConfig;
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/**
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* A static repository to retrieve the available algorithms.
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* @author foerster
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*
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*/
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public class LocalAlgorithmRepository implements ITransactionalAlgorithmRepository{
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private static Logger LOGGER = LoggerFactory.getLogger(LocalAlgorithmRepository.class);
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private Map<String, String> algorithmMap;
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private Map<String, ProcessDescriptionType> processDescriptionMap;
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public LocalAlgorithmRepository() {
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algorithmMap = new HashMap<String, String>();
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processDescriptionMap = new HashMap<String, ProcessDescriptionType>();
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// check if the repository is active
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if(WPSConfig.getInstance().isRepositoryActive(this.getClass().getCanonicalName())){
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Property[] propertyArray = WPSConfig.getInstance().getPropertiesForRepositoryClass(this.getClass().getCanonicalName());
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for(Property property : propertyArray){
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// check the name and active state
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if(property.getName().equalsIgnoreCase("Algorithm") && property.getActive()){
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addAlgorithm(property.getStringValue());
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}
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}
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} else {
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LOGGER.debug("Local Algorithm Repository is inactive.");
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}
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}
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public boolean addAlgorithms(String[] algorithms) {
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for(String algorithmClassName : algorithms) {
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addAlgorithm(algorithmClassName);
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}
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LOGGER.info("Algorithms registered!");
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return true;
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}
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public IAlgorithm getAlgorithm(String className) {
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try {
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return loadAlgorithm(algorithmMap.get(className));
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} catch (Exception e) {
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LOGGER.error("error getting algorithm",e);
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return null;
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}
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}
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public Collection<String> getAlgorithmNames() {
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return new ArrayList<String>(algorithmMap.keySet());
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}
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public boolean containsAlgorithm(String className) {
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return algorithmMap.containsKey(className);
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}
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private IAlgorithm loadAlgorithm(String algorithmClassName) throws Exception {
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Class<?> algorithmClass = LocalAlgorithmRepository.class.getClassLoader().loadClass(algorithmClassName);
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IAlgorithm algorithm = null;
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if (IAlgorithm.class.isAssignableFrom(algorithmClass)) {
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algorithm = IAlgorithm.class.cast(algorithmClass.newInstance());
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} else if (algorithmClass.isAnnotationPresent(Algorithm.class)) {
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// we have an annotated algorithm that doesn't implement IAlgorithm
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// wrap it in a proxy class
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algorithm = new AbstractAnnotatedAlgorithm.Proxy(algorithmClass);
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}
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else {
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throw new Exception("Could not load algorithm " + algorithmClassName + " does not implement IAlgorithm or have a Algorithm annotation.");
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}
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if(!algorithm.processDescriptionIsValid()) {
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LOGGER.warn("Algorithm description is not valid: " + algorithmClassName);
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throw new Exception("Could not load algorithm " +algorithmClassName +". ProcessDescription Not Valid.");
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}
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return algorithm;
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}
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public boolean addAlgorithm(Object processID) {
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if(!(processID instanceof String)){
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return false;
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}
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String algorithmClassName = (String) processID;
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algorithmMap.put(algorithmClassName, algorithmClassName);
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LOGGER.info("Algorithm class registered: " + algorithmClassName);
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return true;
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}
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public boolean removeAlgorithm(Object processID) {
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if(!(processID instanceof String)){
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return false;
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}
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String className = (String) processID;
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if(algorithmMap.containsKey(className)){
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algorithmMap.remove(className);
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return true;
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}
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return false;
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}
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@Override
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public ProcessDescriptionType getProcessDescription(String processID) {
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if(!processDescriptionMap.containsKey(processID)){
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processDescriptionMap.put(processID, getAlgorithm(processID).getDescription());
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}
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return processDescriptionMap.get(processID);
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}
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@Override
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public void shutdown() {
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// TODO Auto-generated method stub
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}
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}
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