org.italiangrid.storm.webdav.authz.vomap.DefaultVOMapDetailsService.java Source code

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Here is the source code for org.italiangrid.storm.webdav.authz.vomap.DefaultVOMapDetailsService.java

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/**
 * Copyright (c) Istituto Nazionale di Fisica Nucleare, 2014.
 *
 * Licensed 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.italiangrid.storm.webdav.authz.vomap;

import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

import javax.security.auth.x500.X500Principal;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.util.Assert;

@Component
public class DefaultVOMapDetailsService implements VOMapDetailsService {

    private static final Logger logger = LoggerFactory.getLogger(DefaultVOMapDetailsService.class);

    private final ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor();

    private final long refreshPeriodInSeconds;

    Set<VOMembershipProvider> providers;

    public DefaultVOMapDetailsService(Set<VOMembershipProvider> providers, long refreshPeriod) {

        Assert.notNull(providers, "Please provide a non-null (but possibly empty) set of providers");
        this.providers = providers;
        this.refreshPeriodInSeconds = refreshPeriod;
        scheduleRefresh();
    }

    private void scheduleRefresh() {

        Runnable refreshTask = new Runnable() {

            @Override
            public void run() {

                refresh();

            }
        };

        scheduler.scheduleWithFixedDelay(refreshTask, refreshPeriodInSeconds, refreshPeriodInSeconds,
                TimeUnit.SECONDS);

    }

    @Override
    public Set<String> getPrincipalVOs(X500Principal principal) {

        Assert.notNull(principal, "Principal cannot be null");

        HashSet<String> voNames = new HashSet<String>();

        for (VOMembershipProvider p : providers) {

            if (p.hasSubjectAsMember(principal.getName())) {
                voNames.add(p.getVOName());
            }
        }

        return Collections.unmodifiableSet(voNames);
    }

    protected void refresh() {

        logger.debug("Refreshing vo membership providers...");
        for (VOMembershipProvider p : providers) {
            if (p instanceof Refreshable) {
                try {
                    ((Refreshable) p).refresh();
                } catch (Throwable t) {
                    logger.warn("Exception caught refreshing VOMembership provider for VO: {}. {}", p.getVOName(),
                            t.getMessage(), t);
                }
            }
        }
    }
}