/**
* 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.hadoop.gateway.webhcat;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URISyntaxException;
import org.apache.hadoop.gateway.deploy.DeploymentContext;
import org.apache.hadoop.gateway.deploy.ServiceDeploymentContributorBase;
import org.apache.hadoop.gateway.descriptor.ResourceDescriptor;
import org.apache.hadoop.gateway.filter.rewrite.api.UrlRewriteRulesDescriptor;
import org.apache.hadoop.gateway.filter.rewrite.api.UrlRewriteRulesDescriptorFactory;
import org.apache.hadoop.gateway.topology.Service;
public class WebHCatDeploymentContributor extends ServiceDeploymentContributorBase {
private static final String RULES_RESOURCE = WebHCatDeploymentContributor.class.getName().replace( '.', '/' ) + "/rewrite.xml";
private static final String WEBHCAT_EXTERNAL_PATH = "/templeton/v1";
@Override
public String getRole() {
return "WEBHCAT";
}
@Override
public String getName() {
return "webhcat";
}
@Override
public void contributeService( DeploymentContext context, Service service ) throws Exception {
contributeRewriteRules( context, service );
contributeResources( context, service );
}
private void contributeRewriteRules( DeploymentContext context, Service service ) throws IOException {
UrlRewriteRulesDescriptor hbaseRules = loadRulesFromTemplate();
UrlRewriteRulesDescriptor clusterRules = context.getDescriptor( "rewrite" );
clusterRules.addRules( hbaseRules );
}
private UrlRewriteRulesDescriptor loadRulesFromTemplate() throws IOException {
InputStream stream = this.getClass().getClassLoader().getResourceAsStream( RULES_RESOURCE );
Reader reader = new InputStreamReader( stream );
UrlRewriteRulesDescriptor rules = UrlRewriteRulesDescriptorFactory.load( "xml", reader );
reader.close();
stream.close();
return rules;
}
private void contributeResources( DeploymentContext context, Service service ) throws URISyntaxException {
ResourceDescriptor rootResource = context.getGatewayDescriptor().addResource();
rootResource.role( service.getRole() );
rootResource.pattern( WEBHCAT_EXTERNAL_PATH + "/?**" );
addWebAppSecFilters( context, service, rootResource );
addAuthenticationFilter( context, service, rootResource );
addRewriteFilter( context, service, rootResource, null );
addIdentityAssertionFilter( context, service, rootResource );
addAuthorizationFilter( context, service, rootResource );
addDispatchFilter( context, service, rootResource );
ResourceDescriptor pathResource = context.getGatewayDescriptor().addResource();
pathResource.role( service.getRole() );
pathResource.pattern( WEBHCAT_EXTERNAL_PATH + "/**?**" );
addWebAppSecFilters( context, service, pathResource );
addAuthenticationFilter( context, service, pathResource );
addRewriteFilter( context, service, pathResource, null );
addIdentityAssertionFilter( context, service, pathResource );
addAuthorizationFilter( context, service, pathResource );
addDispatchFilter( context, service, pathResource );
}
private void addDispatchFilter(
DeploymentContext context, Service service, ResourceDescriptor resource ) {
context.contributeFilter( service, resource, "dispatch", "http-client", null );
}
}