org.opendaylight.netvirt.vpnmanager.intervpnlink.tasks.InterVpnLinkCleanedCheckerTask Maven / Gradle / Ivy

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/*
 * Copyright (c) 2016 Ericsson India Global Services Pvt Ltd. and others. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.netvirt.vpnmanager.intervpnlink.tasks;

import com.google.common.base.Optional;
import com.google.common.util.concurrent.ListenableFuture;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.TimeoutException;
import org.opendaylight.controller.md.sal.binding.api.DataBroker;
import org.opendaylight.netvirt.fibmanager.api.RouteOrigin;
import org.opendaylight.netvirt.vpnmanager.VpnUtil;
import org.opendaylight.netvirt.vpnmanager.intervpnlink.InterVpnLinkUtil;
import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.fibmanager.rev150330.vrfentries.VrfEntry;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.inter.vpn.link.states.InterVpnLinkState;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.netvirt.inter.vpn.link.rev160311.inter.vpn.links.InterVpnLink;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * This Task is in charge of checking that all stuff related to a given
 * InterVpnLink has been removed, like the stateful information, leaked
 * vrfEntries, etc.
 */
public class InterVpnLinkCleanedCheckerTask implements Callable>> {

    private static final Logger LOG = LoggerFactory.getLogger(InterVpnLinkCleanedCheckerTask.class);
    private static final long MAX_WAIT_FOR_REMOVAL = 10000; // 10 seconds

    private final DataBroker dataBroker;
    private final InterVpnLink interVpnLinkToCheck;
    private final InterVpnLinkUtil interVpnLinkUtil;
    private final VpnUtil vpnUtil;

    public InterVpnLinkCleanedCheckerTask(DataBroker dataBroker, InterVpnLink interVpnLink,
                                          InterVpnLinkUtil interVpnLinkUtil, VpnUtil vpnUtil) {
        this.dataBroker = dataBroker;
        this.interVpnLinkToCheck = interVpnLink;
        this.interVpnLinkUtil = interVpnLinkUtil;
        this.vpnUtil = vpnUtil;
    }

    @Override
    public List> call() throws Exception {
        LOG.debug("Checking if InterVpnLink {} is fully cleaned. MAX_WAIT_FOR_REMOVAL={}",
            interVpnLinkToCheck.getName(), MAX_WAIT_FOR_REMOVAL);

        // Check that the State has also been deleted
        Optional optIVpnLinkState =
            interVpnLinkUtil.getInterVpnLinkState(interVpnLinkToCheck.getName());
        long t0 = System.currentTimeMillis();
        long elapsedTime = t0;
        while (optIVpnLinkState.isPresent() && elapsedTime - t0 < MAX_WAIT_FOR_REMOVAL) {
            LOG.debug("InterVpnLink {} State has not yet been removed after {}ms.",
                interVpnLinkToCheck.getName(), elapsedTime - t0);
            Thread.sleep(50);
            optIVpnLinkState = interVpnLinkUtil.getInterVpnLinkState(interVpnLinkToCheck.getName());
            elapsedTime = System.currentTimeMillis();
        }

        if (optIVpnLinkState.isPresent()) {
            throw new TimeoutException("InterVpnLink " + interVpnLinkToCheck.getName()
                + " has not been completely removed after " + MAX_WAIT_FOR_REMOVAL + " ms");
        }

        LOG.debug("InterVpnLink {} State has been removed. Now checking leaked routes", interVpnLinkToCheck.getName());
        String vpn1Rd = vpnUtil.getVpnRd(interVpnLinkToCheck.getFirstEndpoint().getVpnUuid().getValue());
        List leakedVrfEntries =
            vpnUtil.getVrfEntriesByOrigin(vpn1Rd, Collections.singletonList(RouteOrigin.INTERVPN));

        while (!leakedVrfEntries.isEmpty() && t0 - elapsedTime < MAX_WAIT_FOR_REMOVAL) {
            leakedVrfEntries = vpnUtil.getVrfEntriesByOrigin(vpn1Rd, Collections.singletonList(RouteOrigin.INTERVPN));
            elapsedTime = System.currentTimeMillis();
        }
        if (!leakedVrfEntries.isEmpty()) {
            LOG.info("InterVpnLink {} leaked routes have not been removed after {} ms",
                interVpnLinkToCheck.getName(), MAX_WAIT_FOR_REMOVAL);
            throw new TimeoutException("InterVpnLink " + interVpnLinkToCheck.getName()
                + " has not been completely removed after " + MAX_WAIT_FOR_REMOVAL + " ms");
        }

        LOG.debug("InterVpnLink {} State and leaked routes are now fully removed", interVpnLinkToCheck.getName());

        return new ArrayList<>();
    }

}