X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fconfig%2Fconfig-persister-impl%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fconfig%2Fpersist%2Fimpl%2FCapabilityStrippingConfigSnapshotHolder.java;fp=opendaylight%2Fconfig%2Fconfig-persister-impl%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fconfig%2Fpersist%2Fimpl%2FCapabilityStrippingConfigSnapshotHolder.java;h=bcc0fa4d7b9ec4b8bde38c5f20f7317750fdc53b;hb=23fe9ca678ada6263fec5dd996f4025e4a32fcf5;hp=0000000000000000000000000000000000000000;hpb=071a641d7c12c0e6112d5ce0afe806b54f116ed2;p=controller.git diff --git a/opendaylight/config/config-persister-impl/src/main/java/org/opendaylight/controller/config/persist/impl/CapabilityStrippingConfigSnapshotHolder.java b/opendaylight/config/config-persister-impl/src/main/java/org/opendaylight/controller/config/persist/impl/CapabilityStrippingConfigSnapshotHolder.java new file mode 100644 index 0000000000..bcc0fa4d7b --- /dev/null +++ b/opendaylight/config/config-persister-impl/src/main/java/org/opendaylight/controller/config/persist/impl/CapabilityStrippingConfigSnapshotHolder.java @@ -0,0 +1,103 @@ +/* + * Copyright (c) 2013 Cisco Systems, Inc. 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.controller.config.persist.impl; + +import com.google.common.annotations.VisibleForTesting; +import java.util.Collections; +import java.util.HashSet; +import java.util.Map.Entry; +import java.util.Set; +import java.util.SortedSet; +import java.util.TreeSet; +import org.opendaylight.controller.config.persist.api.ConfigSnapshotHolder; +import org.opendaylight.controller.config.util.xml.XmlElement; +import org.opendaylight.controller.config.util.xml.XmlUtil; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import org.w3c.dom.Attr; +import org.w3c.dom.Element; + +/** + * Inspects snapshot xml to be stored, remove all capabilities that are not referenced by it. + * Useful when persisting current configuration. + */ +public class CapabilityStrippingConfigSnapshotHolder implements ConfigSnapshotHolder { + private static final Logger LOG = LoggerFactory.getLogger(CapabilityStrippingConfigSnapshotHolder.class); + + private final String configSnapshot; + private final StripCapabilitiesResult stripCapabilitiesResult; + + public CapabilityStrippingConfigSnapshotHolder(Element snapshot, Set capabilities) { + final XmlElement configElement = XmlElement.fromDomElement(snapshot); + configSnapshot = XmlUtil.toString(configElement.getDomElement()); + stripCapabilitiesResult = stripCapabilities(configElement, capabilities); + } + + private static class StripCapabilitiesResult { + private final SortedSet requiredCapabilities, obsoleteCapabilities; + + private StripCapabilitiesResult(SortedSet requiredCapabilities, SortedSet obsoleteCapabilities) { + this.requiredCapabilities = Collections.unmodifiableSortedSet(requiredCapabilities); + this.obsoleteCapabilities = Collections.unmodifiableSortedSet(obsoleteCapabilities); + } + } + + + @VisibleForTesting + static StripCapabilitiesResult stripCapabilities(XmlElement configElement, Set allCapabilitiesFromHello) { + // collect all namespaces + Set foundNamespacesInXML = getNamespaces(configElement); + LOG.trace("All capabilities {}\nFound namespaces in XML {}", allCapabilitiesFromHello, foundNamespacesInXML); + // required are referenced both in xml and hello + SortedSet requiredCapabilities = new TreeSet<>(); + // can be removed + SortedSet obsoleteCapabilities = new TreeSet<>(); + for (String capability : allCapabilitiesFromHello) { + String namespace = capability.replaceAll("\\?.*",""); + if (foundNamespacesInXML.contains(namespace)) { + requiredCapabilities.add(capability); + } else { + obsoleteCapabilities.add(capability); + } + } + + LOG.trace("Required capabilities {}, \nObsolete capabilities {}", + requiredCapabilities, obsoleteCapabilities); + + return new StripCapabilitiesResult(requiredCapabilities, obsoleteCapabilities); + } + + static Set getNamespaces(XmlElement element){ + Set result = new HashSet<>(); + for (Entry attribute : element.getAttributes().entrySet()) { + if (attribute.getKey().startsWith("xmlns")){ + result.add(attribute.getValue().getValue()); + } + } + for(XmlElement child: element.getChildElements()) { + result.addAll(getNamespaces(child)); + } + return result; + } + + @Override + public SortedSet getCapabilities() { + return stripCapabilitiesResult.requiredCapabilities; + } + + @VisibleForTesting + Set getObsoleteCapabilities(){ + return stripCapabilitiesResult.obsoleteCapabilities; + } + + @Override + public String getConfigSnapshot() { + return configSnapshot; + } +}