/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.ambari.server.audit.request.eventcreator;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.ambari.server.api.services.NamedPropertySet;
import org.apache.ambari.server.api.services.Request;
import org.apache.ambari.server.api.services.Result;
import org.apache.ambari.server.api.services.ResultStatus;
import org.apache.ambari.server.audit.event.AuditEvent;
import org.apache.ambari.server.audit.event.request.AddComponentToHostRequestAuditEvent;
import org.apache.ambari.server.audit.event.request.AddHostRequestAuditEvent;
import org.apache.ambari.server.audit.event.request.DeleteHostRequestAuditEvent;
import org.apache.ambari.server.controller.internal.HostComponentResourceProvider;
import org.apache.ambari.server.controller.internal.HostResourceProvider;
import org.apache.ambari.server.controller.spi.Resource;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
/**
* This creator handles host requests (add, delete, add component)
* For resource type {@link Resource.Type#HostComponent}
* and request types {@link Request.Type#POST}, {@link Request.Type#DELETE} and {@link Request.Type#QUERY_POST}
*/
public class HostEventCreator implements RequestAuditEventCreator {
/**
* Set of {@link Request.Type}s that are handled by this plugin
*/
private Set<Request.Type> requestTypes = ImmutableSet.<Request.Type>builder().add(Request.Type.QUERY_POST, Request.Type.POST, Request.Type.DELETE).build();
/**
* Set of {@link Resource.Type}s that are handled by this plugin
*/
private Set<Resource.Type> resourceTypes = ImmutableSet.<Resource.Type>builder().add(Resource.Type.Host).build();
/**
* Pattern to retrieve hostname from url
*/
private static final Pattern HOSTNAME_PATTERN = Pattern.compile(".*" + HostResourceProvider.HOST_NAME_PROPERTY_ID + "\\s*=\\s*([^&\\s]+).*");
/**
* {@inheritDoc}
*/
@Override
public Set<Request.Type> getRequestTypes() {
return requestTypes;
}
/**
* {@inheritDoc}
*/
@Override
public Set<Resource.Type> getResourceTypes() {
return resourceTypes;
}
/**
* {@inheritDoc}
*/
@Override
public Set<ResultStatus.STATUS> getResultStatuses() {
// null makes this default
return null;
}
/**
* {@inheritDoc}
*/
@Override
public AuditEvent createAuditEvent(Request request, Result result) {
switch (request.getRequestType()) {
case DELETE:
return DeleteHostRequestAuditEvent.builder()
.withTimestamp(System.currentTimeMillis())
.withRequestType(request.getRequestType())
.withResultStatus(result.getStatus())
.withUrl(request.getURI())
.withRemoteIp(request.getRemoteAddress())
.withHostName(request.getResource().getKeyValueMap().get(Resource.Type.Host))
.build();
case POST:
return AddHostRequestAuditEvent.builder()
.withTimestamp(System.currentTimeMillis())
.withRequestType(request.getRequestType())
.withResultStatus(result.getStatus())
.withUrl(request.getURI())
.withRemoteIp(request.getRemoteAddress())
.withHostName(RequestAuditEventCreatorHelper.getNamedProperty(request, HostResourceProvider.HOST_NAME_PROPERTY_ID))
.build();
case QUERY_POST:
return AddComponentToHostRequestAuditEvent.builder()
.withTimestamp(System.currentTimeMillis())
.withRequestType(request.getRequestType())
.withResultStatus(result.getStatus())
.withUrl(request.getURI())
.withRemoteIp(request.getRemoteAddress())
.withHostName(getHostNameFromQuery(request))
.withComponents(getHostComponents(request))
.build();
default:
return null;
}
}
/**
* Returns component name from the request
* @param request
* @return
*/
private Set<String> getHostComponents(Request request) {
Set<String> components = new HashSet<>();
NamedPropertySet propertySet = Iterables.getFirst(request.getBody().getNamedPropertySets(), null);
if (propertySet != null && propertySet.getProperties().get("host_components") instanceof Set) {
Set<Map<String, String>> set = (Set<Map<String, String>>) propertySet.getProperties().get("host_components");
if (set != null && !set.isEmpty()) {
for(Map<String, String> element : set) {
components.add(element.get(HostComponentResourceProvider.HOST_COMPONENT_COMPONENT_NAME_PROPERTY_ID));
}
}
}
return components;
}
/**
* Returns hostname from the query string of the request
* @param request
* @return
*/
private String getHostNameFromQuery(Request request) {
Matcher matcher = HOSTNAME_PATTERN.matcher(request.getURI());
if(matcher.find()) {
return matcher.group(1);
}
return null;
}
}