* 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.

*/

* Credentials implementation to store in jobConf, HCat-specific properties such as Principal and Uri

* User specifies these credential properties along with the action configuration

* The jobConf is used further to pass credentials to the tasks while running

* Oozie server should be configured to use this Credentials class by including it via property 'oozie.credentials.credentialclasses'

* User can extend the parent class to implement own class as well

* for handling custom token-based credentials and add to the above server property

*/

    private static final String HCAT_METASTORE_PRINCIPAL = "hcat.metastore.principal";

    private static final String HCAT_METASTORE_URI = "hcat.metastore.uri";

    /* (non-Javadoc)

     * @see org.apache.oozie.action.hadoop.Credentials#addtoJobConf(org.apache.hadoop.mapred.JobConf, org.apache.oozie.action.hadoop.CredentialsProperties, org.apache.oozie.action.ActionExecutor.Context)

     */

    @Override

    public void addtoJobConf(JobConf jobconf, CredentialsProperties props, Context context) throws Exception {

        try {

            String principal = props.getProperties().get(HCAT_METASTORE_PRINCIPAL);

            if (principal == null || principal.isEmpty()) {

                throw new CredentialException(ErrorCode.E0510,

                        HCAT_METASTORE_PRINCIPAL + " is required to get hcat credential");

            }

            String server = props.getProperties().get(HCAT_METASTORE_URI);

            if (server == null || server.isEmpty()) {

                throw new CredentialException(ErrorCode.E0510,

                        HCAT_METASTORE_URI + " is required to get hcat credential");

            }

            HCatCredentialHelper hcch = new HCatCredentialHelper();

            hcch.set(jobconf, principal, server);

        }

        catch (Exception e) {

            XLog.getLog(getClass()).warn("Exception in addtoJobConf", e);

            throw e;

        }

    }

}