com.francetelecom.clara.cloud.commons.toggles.PaasJndiStateRepository.java Source code

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Here is the source code for com.francetelecom.clara.cloud.commons.toggles.PaasJndiStateRepository.java

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/**
 * Copyright (C) 2015 Orange
 * Licensed 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 com.francetelecom.clara.cloud.commons.toggles;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import javax.naming.InitialContext;
import javax.naming.NameNotFoundException;
import javax.naming.NamingException;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.exception.ExceptionUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.togglz.core.Feature;
import org.togglz.core.repository.FeatureState;
import org.togglz.core.repository.StateRepository;

/**
 * Feature RepositoryState based on Jndi to store feature state and users<br>
 * Features are stored as String values under following names:
 * <pre>
 *  FEATURE1=true/false
 *  FEATURE1.users=user1, user2, ...
 * </pre>
 *
 */
public class PaasJndiStateRepository implements StateRepository {

    Logger logger = LoggerFactory.getLogger(PaasJndiStateRepository.class);

    private InitialContext initialContext = null;

    @Override
    public FeatureState getFeatureState(Feature feature) {
        try {
            InitialContext jndiContext = getInitialContext();
            String value = (String) jndiContext.lookup(feature.name());
            if (!(value.equalsIgnoreCase("true") || value.equalsIgnoreCase("false"))) {
                return null;
            }
            boolean enabled = Boolean.valueOf(value);
            List<String> users = getFeatureUsers(feature);
            FeatureState featureState = new FeatureState(feature, enabled, users);
            return featureState;
        } catch (NameNotFoundException e) {
            logger.warn("state of feature " + feature.name() + " is not already defined in jndi");
        } catch (NamingException e) {
            if (ExceptionUtils.indexOfType(e, NameNotFoundException.class) != -1) {
                logger.warn("state of feature " + feature.name() + " is not already defined in jndi");
            } else {
                logger.error("unable to read state of feature " + feature.name(), e);
            }
        } catch (ClassCastException e) {
            logger.error("unable to read state of feature " + feature.name(), e);
        }
        // By default return null (no feature state found or invalid)
        return null;
    }

    protected List<String> getFeatureUsers(Feature feature) {
        List<String> users = new ArrayList<String>();
        try {
            InitialContext jndiContext = getInitialContext();
            String value = (String) jndiContext.lookup(feature.name() + ".users");
            if (value != null) {
                value = value.trim();
                if (!value.equals("")) {
                    users = Arrays.asList(value.split("( )*,( )*"));
                }
            }
        } catch (NamingException e) {
            logger.debug("unable to fetch user lists for feature " + feature.name());
        }
        return users;
    }

    @Override
    public void setFeatureState(FeatureState featureState) {
        String featureName = featureState.getFeature().name();
        try {
            InitialContext jndiContext = getInitialContext();
            jndiContext.rebind(featureName, Boolean.toString(featureState.isEnabled()));
            String users = StringUtils.join(featureState.getUsers(), ", ");
            //for(String user:featureState.getUsers()) users += user+", ";
            jndiContext.rebind(featureName + ".users", users);
        } catch (NamingException e) {
            logger.error("unable to save state of feature " + featureName + " in jndi", e);
        }
    }

    /**
     * @return
     * @throws NamingException
     */
    protected InitialContext getInitialContext() throws NamingException {
        if (initialContext == null) {
            initialContext = createInitialContext();
        }
        return initialContext;
    }

    /**
     * wrap new InitialContext for testing purpose
     * @return
     * @throws NamingException
     */
    protected InitialContext createInitialContext() throws NamingException {
        return new InitialContext();
    }

}