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package eu.dnetlib.msro.workflows.sarasvati.registry;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Map.Entry;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.springframework.beans.factory.annotation.Required;
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import com.google.common.collect.BiMap;
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import com.google.common.collect.HashBiMap;
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import com.googlecode.sarasvati.GraphProcess;
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import eu.dnetlib.msro.workflows.util.ProcessUtils;
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public class GraphProcessRegistry {
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private static final Log log = LogFactory.getLog(GraphProcessRegistry.class); // NOPMD by marko on 11/24/08 5:02 PM
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private BiMap<String, GraphProcess> procs = HashBiMap.create();
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private Map<String, Collection<GraphProcess>> byResource = new HashMap<String, Collection<GraphProcess>>();
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private int maxSize;
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public GraphProcess findProcess(final String identifier) {
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return procs.get(identifier);
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}
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public Collection<GraphProcess> findProcessesByResource(final String identifier) {
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synchronized (this) {
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final Collection<GraphProcess> res = byResource.get(identifier);
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if (res == null) {
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return new ArrayList<GraphProcess>();
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}
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return res;
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}
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}
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public String associateProcessWithResource(final GraphProcess process, final String identifier) {
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registerProcess(process);
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synchronized (this) {
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final Collection<GraphProcess> processes = findProcessesByResource(identifier);
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processes.add(process);
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byResource.put(identifier, processes);
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}
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return identifier;
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}
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public String registerProcess(final GraphProcess process) {
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if (procs.containsValue(process)) {
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return procs.inverse().get(process);
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}
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final String id = ProcessUtils.generateProcessId();
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if (procs.size() >= maxSize) {
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removeOldestProcess();
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}
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procs.put(id, process);
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log.info("Registered proc " + process.getGraph().getName() + " with id " + id);
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return id;
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}
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public int countRunningWfs() {
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int count = 0;
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for (Entry<String, GraphProcess> e : procs.entrySet()) {
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final GraphProcess proc = e.getValue();
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if (!proc.isComplete() && !proc.isCanceled()) {
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count++;
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}
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}
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return count;
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}
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private void removeOldestProcess() {
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Date oldDate = new Date();
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String oldId = null;
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for (Entry<String, GraphProcess> e : procs.entrySet()) {
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final GraphProcess proc = e.getValue();
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if (proc.isComplete() || proc.isCanceled()) {
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final Date date = ProcessUtils.calculateLastActivityDate(proc);
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if (date.before(oldDate)) {
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oldDate = date;
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oldId = e.getKey();
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}
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}
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}
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if (oldId != null) {
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unregisterProcess(oldId);
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}
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}
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public void unregisterProcess(final String identifier) {
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final GraphProcess process = findProcess(identifier); // NOPMD
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procs.remove(identifier);
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for (final Collection<GraphProcess> processes : byResource.values()) {
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processes.remove(process);
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}
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}
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public Collection<String> listIdentifiers() {
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return procs.keySet();
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}
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public Map<String, Collection<GraphProcess>> getByResource() {
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return byResource;
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}
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public int getMaxSize() {
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return maxSize;
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}
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@Required
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public void setMaxSize(int maxSize) {
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this.maxSize = maxSize;
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}
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}
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