opendaylight/netconf/config-netconf-connector/src/main/java/org/opendaylight/controller/netconf/confignetconfconnector/operations/editconfig/EditConfigXmlParser.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.controller.netconf.confignetconfconnector.operations.editconfig;
  10
  11 import com.google.common.annotations.VisibleForTesting;
  12 import com.google.common.base.Optional;
  13 import com.google.common.base.Preconditions;
  14 import com.google.common.collect.Multimap;
  15 import org.opendaylight.controller.config.util.ConfigRegistryClient;
  16 import org.opendaylight.controller.netconf.api.NetconfDocumentedException;
  17 import org.opendaylight.controller.netconf.confignetconfconnector.mapping.config.Config;
  18 import org.opendaylight.controller.netconf.confignetconfconnector.mapping.config.ModuleElementResolved;
  19 import org.opendaylight.controller.netconf.confignetconfconnector.operations.Datastore;
  20 import org.opendaylight.controller.netconf.confignetconfconnector.transactions.TransactionProvider;
  21 import org.opendaylight.controller.netconf.util.xml.XmlElement;
  22 import org.opendaylight.controller.netconf.util.xml.XmlNetconfConstants;
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25
  26 import javax.management.ObjectName;
  27 import java.util.Arrays;
  28 import java.util.Collections;
  29 import java.util.Map;
  30 import java.util.Set;
  31
  32 public class EditConfigXmlParser {
  33
  34     private static final Logger logger = LoggerFactory.getLogger(EditConfigXmlParser.class);
  35
  36     public static final String EDIT_CONFIG = "edit-config";
  37     public static final String DEFAULT_OPERATION_KEY = "default-operation";
  38     static final String ERROR_OPTION_KEY = "error-option";
  39     static final String DEFAULT_ERROR_OPTION = "stop-on-error";
  40     static final String TARGET_KEY = "target";
  41     static final String TEST_OPTION_KEY = "test-option";
  42
  43     public EditConfigXmlParser() {
  44     }
  45
  46     EditConfigXmlParser.EditConfigExecution fromXml(final XmlElement xml, final Config cfgMapping,
  47                                                     TransactionProvider transactionProvider, ConfigRegistryClient configRegistryClient)
  48             throws NetconfDocumentedException {
  49
  50         EditStrategyType.resetDefaultStrategy();
  51
  52         xml.checkName(EditConfigXmlParser.EDIT_CONFIG);
  53         xml.checkNamespace(XmlNetconfConstants.URN_IETF_PARAMS_XML_NS_NETCONF_BASE_1_0);
  54
  55         XmlElement targetElement = xml.getOnlyChildElementWithSameNamespace(EditConfigXmlParser.TARGET_KEY);
  56         XmlElement targetChildNode = targetElement.getOnlyChildElementWithSameNamespace();
  57         String datastoreValue = targetChildNode.getName();
  58         Datastore targetDatastore = Datastore.valueOf(datastoreValue);
  59         logger.debug("Setting {} to '{}'", EditConfigXmlParser.TARGET_KEY, targetDatastore);
  60
  61         // check target
  62         Preconditions.checkArgument(targetDatastore == Datastore.candidate,
  63                 "Only %s datastore supported for edit config but was: %s", Datastore.candidate, targetDatastore);
  64
  65         // Test option
  66         TestOption testOption;
  67         Optional<XmlElement> testOptionElementOpt = xml
  68                 .getOnlyChildElementWithSameNamespaceOptionally(EditConfigXmlParser.TEST_OPTION_KEY);
  69         if (testOptionElementOpt.isPresent()) {
  70             String testOptionValue = testOptionElementOpt.get().getTextContent();
  71             testOption = EditConfigXmlParser.TestOption.getFromXmlName(testOptionValue);
  72         } else {
  73             testOption = EditConfigXmlParser.TestOption.getDefault();
  74         }
  75         logger.debug("Setting {} to '{}'", EditConfigXmlParser.TEST_OPTION_KEY, testOption);
  76
  77         // Error option
  78         Optional<XmlElement> errorOptionElement = xml
  79                 .getOnlyChildElementWithSameNamespaceOptionally(EditConfigXmlParser.ERROR_OPTION_KEY);
  80         if (errorOptionElement.isPresent()) {
  81             String errorOptionParsed = errorOptionElement.get().getTextContent();
  82             if (false == errorOptionParsed.equals(EditConfigXmlParser.DEFAULT_ERROR_OPTION))
  83                 throw new UnsupportedOperationException("Only " + EditConfigXmlParser.DEFAULT_ERROR_OPTION
  84                         + " supported for " + EditConfigXmlParser.ERROR_OPTION_KEY + ", was " + errorOptionParsed);
  85         }
  86
  87         // Default op
  88         Optional<XmlElement> defaultContent = xml
  89                 .getOnlyChildElementWithSameNamespaceOptionally(EditConfigXmlParser.DEFAULT_OPERATION_KEY);
  90         if (defaultContent.isPresent()) {
  91             String mergeStrategyString = defaultContent.get().getTextContent();
  92             logger.trace("Setting merge strategy to {}", mergeStrategyString);
  93             EditStrategyType editStrategyType = EditStrategyType.valueOf(mergeStrategyString);
  94             // FIXME: thread safety, remove global state
  95             EditStrategyType.setDefaultStrategy(editStrategyType);
  96         }
  97         // FIXME: thread safety, remove global state
  98         Set<ObjectName> instancesForFillingServiceRefMapping = Collections.emptySet();
  99         if (EditStrategyType.defaultStrategy() == EditStrategyType.merge) {
 100             instancesForFillingServiceRefMapping = Datastore.getInstanceQueryStrategy(targetDatastore, transactionProvider)
 101                     .queryInstances(configRegistryClient);
 102             logger.trace("Pre-filling services from following instances: {}", instancesForFillingServiceRefMapping);
 103         }
 104
 105         XmlElement configElement = xml.getOnlyChildElementWithSameNamespace(XmlNetconfConstants.CONFIG_KEY);
 106
 107         return new EditConfigXmlParser.EditConfigExecution(xml, cfgMapping, configElement, testOption, instancesForFillingServiceRefMapping);
 108     }
 109
 110     private void removeMountpointsFromConfig(XmlElement configElement, XmlElement mountpointsElement) {
 111         configElement.getDomElement().removeChild(mountpointsElement.getDomElement());
 112     }
 113
 114     @VisibleForTesting
 115     static enum TestOption {
 116         testOnly, set, testThenSet;
 117
 118         static TestOption getFromXmlName(String testOptionXmlName) {
 119             switch (testOptionXmlName) {
 120             case "test-only":
 121                 return testOnly;
 122             case "test-then-set":
 123                 return testThenSet;
 124             case "set":
 125                 return set;
 126             default:
 127                 throw new IllegalArgumentException("Unsupported test option " + testOptionXmlName + " supported: "
 128                         + Arrays.toString(TestOption.values()));
 129             }
 130         }
 131
 132         public static TestOption getDefault() {
 133             return testThenSet;
 134         }
 135
 136     }
 137
 138     @VisibleForTesting
 139     static class EditConfigExecution {
 140         XmlElement editConfigXml;
 141         Map<String, Multimap<String, ModuleElementResolved>> resolvedXmlElements;
 142         TestOption testOption;
 143
 144         EditConfigExecution(XmlElement xml, Config configResolver, XmlElement configElement, TestOption testOption, Set<ObjectName> instancesForFillingServiceRefMapping) {
 145             this.editConfigXml = xml;
 146             this.resolvedXmlElements = configResolver.fromXml(configElement, instancesForFillingServiceRefMapping);
 147             this.testOption = testOption;
 148         }
 149
 150         boolean shouldTest() {
 151             return testOption == TestOption.testOnly || testOption == TestOption.testThenSet;
 152         }
 153
 154         boolean shouldSet() {
 155             return testOption == TestOption.set || testOption == TestOption.testThenSet;
 156         }
 157     }
 158 }