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/*
* Copyright © 2016-2017 European Support Limited
*
* 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 org.openecomp.core.zusammen.impl;
import org.apache.commons.lang3.StringUtils;
import org.openecomp.core.nosqldb.util.CassandraUtils;
import java.util.function.Supplier;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
public class CassandraConnectionInitializer implements ServletContextListener {
private static final String CASSANDRA_PREFIX = "cassandra.";
private static final String DATA_CENTER_PROPERTY_NAME = CASSANDRA_PREFIX + "datacenter";
private static final String CONSISTENCY_LEVEL_PROPERTY_NAME =
CASSANDRA_PREFIX + "consistency.level";
private static final String NODES_PROPERTY_NAME = CASSANDRA_PREFIX + "nodes";
private static final String AUTHENTICATE_PROPERTY_NAME = CASSANDRA_PREFIX + "authenticate";
private static final String SSL_PROPERTY_NAME = CASSANDRA_PREFIX + "ssl";
private static final String TRUSTSTORE_PROPERTY_NAME = CASSANDRA_PREFIX + "truststore";
private static final String TRUSTSTORE_PASSWORD_PROPERTY_NAME =
CASSANDRA_PREFIX + "truststore.password";
private static final String USER_PROPERTY_NAME = CASSANDRA_PREFIX + "user";
private static final String PASSWORD_PROPERTY_NAME = CASSANDRA_PREFIX + "password";
private static final String KEYSPACE_PROPERTY_NAME = CASSANDRA_PREFIX + "keyspace";
private static final String ZUSAMMEN = "zusammen";
@Override
public void contextInitialized(ServletContextEvent servletContextEvent) {
setCassandraConnectionPropertiesToSystem();
}
public static void setCassandraConnectionPropertiesToSystem() {
DeferredInitializer.init();
}
@Override
public void contextDestroyed(ServletContextEvent servletContextEvent) {
// no-op, required by the interface
}
private static class DeferredInitializer {
static {
setSystemProperty(NODES_PROPERTY_NAME, () ->
StringUtils.join(CassandraUtils.getAddresses(), ','));
setBooleanSystemProperty(AUTHENTICATE_PROPERTY_NAME, CassandraUtils::isAuthenticate);
setBooleanSystemProperty(SSL_PROPERTY_NAME, CassandraUtils::isSsl);
setSystemProperty(TRUSTSTORE_PROPERTY_NAME, CassandraUtils::getTruststore);
setSystemProperty(TRUSTSTORE_PASSWORD_PROPERTY_NAME, CassandraUtils::getTruststorePassword);
setSystemProperty(USER_PROPERTY_NAME, CassandraUtils::getUser);
setSystemProperty(PASSWORD_PROPERTY_NAME, CassandraUtils::getPassword);
setSystemProperty(KEYSPACE_PROPERTY_NAME, () -> ZUSAMMEN);
setNullableSystemProperty(DATA_CENTER_PROPERTY_NAME, CassandraUtils::getLocalDataCenter);
setNullableSystemProperty(CONSISTENCY_LEVEL_PROPERTY_NAME,
CassandraUtils::getConsistencyLevel);
}
private static void setSystemProperty(String name, Supplier<String> valueSupplier) {
if (System.getProperty(name) == null) {
System.setProperty(name, valueSupplier.get());
}
}
private static void setBooleanSystemProperty(String name, Supplier<Boolean> valueSupplier) {
setSystemProperty(name, () -> Boolean.toString(valueSupplier.get()));
}
private static void setNullableSystemProperty(String name, Supplier<String> valueSupplier) {
if ((System.getProperty(name) == null) && (valueSupplier.get() != null)) {
System.setProperty(name, valueSupplier.get());
}
}
private DeferredInitializer() { }
public static void init() {
// just to ensure static initialization
}
}
}
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