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package eu.dnetlib.msro.workflows.graph;
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import java.util.*;
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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 eu.dnetlib.miscutils.datetime.DateUtils;
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import eu.dnetlib.msro.rmi.MSROException;
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import eu.dnetlib.msro.workflows.util.ProcessUtils;
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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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/**
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* Created by michele on 20/11/15.
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*/
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public class ProcessRegistry {
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private static final Log log = LogFactory.getLog(ProcessRegistry.class);
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private BiMap<String, Process> procs = HashBiMap.create();
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private Map<String, Collection<Process>> byOtherId = new HashMap<String, Collection<Process>>();
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private int maxSize;
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synchronized public int countRunningWfs() {
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int count = 0;
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for (Map.Entry<String, Process> e : procs.entrySet()) {
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final Process proc = e.getValue();
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if (!proc.isTerminated()) {
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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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public Process findProcess(final String procId) {
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return procs.get(procId);
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}
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public Set<Process> listProcesses() {
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return procs.values();
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}
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public Collection<Process> findProcsByOtherId(final String id) {
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synchronized (this) {
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final Collection<Process> res = byOtherId.get(id);
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return res != null ? res : new ArrayList<Process>();
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}
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}
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public void registerProcess(final Process process, final String... ids) throws MSROException {
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if (procs.containsValue(process) || procs.containsKey(process.getId())) {
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log.error("Already registerd process: " + process);
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throw new MSROException("Already registerd process: " + process);
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}
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if (procs.size() >= maxSize) {
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removeOldestProcess();
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}
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procs.put(process.getId(), process);
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for (String id : ids) {
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synchronized (this) {
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if (!byOtherId.containsKey(id)) {
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byOtherId.put(id, new ArrayList<Process>());
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}
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byOtherId.get(id).add(process);
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}
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}
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log.info("Registered process " + process);
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}
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private void removeOldestProcess() {
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long oldDate = DateUtils.now();
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String oldId = null;
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for (Map.Entry<String, Process> e : procs.entrySet()) {
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final Process proc = e.getValue();
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if (proc.isTerminated()) {
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final long date = ProcessUtils.calculateLastActivityDate(proc);
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if (date < 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 procId) {
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synchronized (this) {
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final Process process = procs.remove(procId);
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if (process != null) {
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for (final Collection<Process> processes : byOtherId.values()) {
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processes.remove(process);
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}
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}
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}
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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(final int maxSize) {
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this.maxSize = maxSize;
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}
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}
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