/**
* Copyright 2005-2016 Red Hat, Inc.
*
* Red Hat 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 io.fabric8.karaf.cm;
import java.util.Dictionary;
import java.util.concurrent.atomic.AtomicReference;
import io.fabric8.karaf.core.properties.PlaceholderResolver;
import org.apache.felix.scr.annotations.Activate;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.ConfigurationPolicy;
import org.apache.felix.scr.annotations.Properties;
import org.apache.felix.scr.annotations.Property;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.ReferenceCardinality;
import org.apache.felix.scr.annotations.ReferencePolicy;
import org.apache.felix.scr.annotations.Service;
import org.osgi.framework.ServiceReference;
import org.osgi.service.cm.ConfigurationPlugin;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static io.fabric8.karaf.cm.KubernetesConstants.FABRIC8_CONFIG_PLUGIN_ENABLED;
import static io.fabric8.karaf.cm.KubernetesConstants.FABRIC8_CONFIG_PLUGIN_ENABLED_DEFAULT;
import static io.fabric8.kubernetes.client.utils.Utils.getSystemPropertyOrEnvVar;
@Component(
immediate = true,
policy = ConfigurationPolicy.IGNORE,
createPid = false
)
@Reference(
name = "resolver",
cardinality = ReferenceCardinality.OPTIONAL_MULTIPLE,
policy = ReferencePolicy.DYNAMIC,
referenceInterface = PlaceholderResolver.class
)
@Properties({
@Property(name = ConfigurationPlugin.CM_RANKING, value = "10", classValue = Integer.class)
})
@Service(ConfigurationPlugin.class)
public class PlaceholderResolverConfigurationPlugin implements ConfigurationPlugin {
private static final Logger LOGGER = LoggerFactory.getLogger(PlaceholderResolverConfigurationPlugin.class);
private final AtomicReference<PlaceholderResolver> resolver;
private boolean enabled;
public PlaceholderResolverConfigurationPlugin() {
this.resolver = new AtomicReference<>();
this.enabled = FABRIC8_CONFIG_PLUGIN_ENABLED_DEFAULT;
}
// ***********************
// Lifecycle
// ***********************
@Activate
void activate() {
enabled = getSystemPropertyOrEnvVar(FABRIC8_CONFIG_PLUGIN_ENABLED, enabled);
LOGGER.debug("Configuration update is {}", enabled ? "ENABLED" : "DISABLED");
}
// ****************************
// Binding
// ****************************
protected void bindResolver(PlaceholderResolver resolver) {
this.resolver.set(resolver);
}
protected void unbindResolver(PlaceholderResolver resolver) {
this.resolver.compareAndSet(resolver, null);
}
// ***********************
// ConfigurationPlugin
// ***********************
@Override
public void modifyConfiguration(ServiceReference<?> reference, Dictionary<String, Object> dictionary) {
PlaceholderResolver res = resolver.get();
if (enabled && res != null) {
res.replaceAll(dictionary);
}
}
}