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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.model.builder.xml.dom;
import com.yahoo.config.application.api.DeployLogger;
import com.yahoo.config.model.deploy.DeployState;
import com.yahoo.config.model.producer.AbstractConfigProducer;
import com.yahoo.container.bundle.BundleInstantiationSpecification;
import com.yahoo.osgi.provider.model.ComponentModel;
import com.yahoo.text.XML;
import com.yahoo.vespa.model.container.ApplicationContainerCluster;
import com.yahoo.vespa.model.container.component.BindingPattern;
import com.yahoo.vespa.model.container.component.Component;
import com.yahoo.vespa.model.container.component.Handler;
import com.yahoo.vespa.model.container.component.UserBindingPattern;
import com.yahoo.vespa.model.container.xml.BundleInstantiationSpecificationBuilder;
import org.w3c.dom.Element;
import java.util.List;
import java.util.Set;
import java.util.logging.Level;
import static com.yahoo.vespa.model.container.ApplicationContainerCluster.METRICS_V2_HANDLER_BINDING_1;
import static com.yahoo.vespa.model.container.ApplicationContainerCluster.METRICS_V2_HANDLER_BINDING_2;
import static com.yahoo.vespa.model.container.ContainerCluster.STATE_HANDLER_BINDING_1;
import static com.yahoo.vespa.model.container.ContainerCluster.STATE_HANDLER_BINDING_2;
import static com.yahoo.vespa.model.container.ContainerCluster.VIP_HANDLER_BINDING;
import static java.util.logging.Level.INFO;
/**
* @author gjoranv
*/
public class DomHandlerBuilder extends VespaDomBuilder.DomConfigProducerBuilder<Handler<?>> {
private static final Set<BindingPattern> reservedBindings =
Set.of(METRICS_V2_HANDLER_BINDING_1,
METRICS_V2_HANDLER_BINDING_2,
STATE_HANDLER_BINDING_1,
STATE_HANDLER_BINDING_2,
VIP_HANDLER_BINDING);
private final ApplicationContainerCluster cluster;
public DomHandlerBuilder(ApplicationContainerCluster cluster) {
this.cluster = cluster;
}
@Override
protected Handler<?> doBuild(DeployState deployState, AbstractConfigProducer<?> parent, Element handlerElement) {
Handler<? super Component<?, ?>> handler = createHandler(handlerElement);
for (Element binding : XML.getChildren(handlerElement, "binding"))
addServerBinding(handler, UserBindingPattern.fromPattern(XML.getValue(binding)), deployState.getDeployLogger());
List<Element> clientBindingsElements = XML.getChildren(handlerElement, "clientBinding");
if (! clientBindingsElements.isEmpty()) {
deployState.getDeployLogger().logApplicationPackage(
Level.WARNING, "The 'clientBindings' element is deprecated for removal in Vespa 8, with no replacement");
}
for (Element clientBinding : clientBindingsElements)
handler.addClientBindings(UserBindingPattern.fromPattern(XML.getValue(clientBinding)));
DomComponentBuilder.addChildren(deployState, parent, handlerElement, handler);
return handler;
}
Handler<? super Component<?, ?>> createHandler(Element handlerElement) {
BundleInstantiationSpecification bundleSpec = BundleInstantiationSpecificationBuilder.build(handlerElement);
return new Handler<>(new ComponentModel(bundleSpec));
}
private void addServerBinding(Handler<? super Component<?, ?>> handler, BindingPattern binding, DeployLogger log) {
throwIfBindingIsReserved(binding, handler);
handler.addServerBindings(binding);
removeExistingServerBinding(binding, handler, log);
}
private void throwIfBindingIsReserved(BindingPattern binding, Handler<?> newHandler) {
for (var reserved : reservedBindings) {
if (binding.hasSamePattern(reserved)) {
throw new IllegalArgumentException("Binding '" + binding.patternString() + "' is a reserved Vespa binding and " +
"cannot be used by handler: " + newHandler.getComponentId());
}
}
}
private void removeExistingServerBinding(BindingPattern binding, Handler<?> newHandler, DeployLogger log) {
for (var handler : cluster.getHandlers()) {
for (BindingPattern serverBinding : handler.getServerBindings()) {
if (serverBinding.hasSamePattern(binding)) {
handler.removeServerBinding(serverBinding);
log.logApplicationPackage(INFO, "Binding '" + binding.patternString() + "' was already in use by handler '" +
handler.getComponentId() + "', but will now be taken over by handler: " + newHandler.getComponentId());
}
}
}
}
}
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