Github user aledsage commented on a diff in the pull request: https://github.com/apache/brooklyn-server/pull/177#discussion_r66331540 --- Diff: core/src/main/java/org/apache/brooklyn/core/network/OnPublicNetworkEnricher.java --- @@ -0,0 +1,496 @@ +/* + * 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. + */ +package org.apache.brooklyn.core.network; + +import java.net.URI; +import java.net.URISyntaxException; +import java.net.URL; +import java.util.Collection; + +import org.apache.brooklyn.api.entity.Entity; +import org.apache.brooklyn.api.entity.EntityLocal; +import org.apache.brooklyn.api.location.Location; +import org.apache.brooklyn.api.location.MachineLocation; +import org.apache.brooklyn.api.sensor.AttributeSensor; +import org.apache.brooklyn.api.sensor.Sensor; +import org.apache.brooklyn.api.sensor.SensorEvent; +import org.apache.brooklyn.api.sensor.SensorEventListener; +import org.apache.brooklyn.config.ConfigKey; +import org.apache.brooklyn.core.config.ConfigKeys; +import org.apache.brooklyn.core.enricher.AbstractEnricher; +import org.apache.brooklyn.core.entity.AbstractEntity; +import org.apache.brooklyn.core.location.Machines; +import org.apache.brooklyn.core.location.access.PortForwardManager; +import org.apache.brooklyn.core.location.access.PortForwardManagerLocationResolver; +import org.apache.brooklyn.core.location.access.PortForwardManager.AssociationListener; +import org.apache.brooklyn.core.location.access.PortForwardManager.AssociationMetadata; +import org.apache.brooklyn.core.sensor.Sensors; +import org.apache.brooklyn.util.core.flags.TypeCoercions; +import org.apache.brooklyn.util.exceptions.Exceptions; +import org.apache.brooklyn.util.guava.Maybe; +import org.apache.brooklyn.util.net.Networking; +import org.apache.brooklyn.util.text.StringPredicates; +import org.apache.brooklyn.util.text.Strings; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import com.google.common.annotations.Beta; +import com.google.common.base.Function; +import com.google.common.base.Optional; +import com.google.common.base.Predicate; +import com.google.common.base.Predicates; +import com.google.common.collect.Lists; +import com.google.common.net.HostAndPort; +import com.google.common.reflect.TypeToken; + +/** + * Can be added to an entity so that it advertises its mapped ports (according to the port-mappings + * recorded in the PortForwardManager). This can be used with sensors of type URI, HostAndPort + * or plain integer port values. The port-mappings is retrieved by looking up the entity's machine + * and the private port, in the PortForwardManager's recorded port-mappings. + * + * For example, to configure each Tomcat node to publish its mapped uri, and to use that sensor + * in Nginx for the target servers: + * <pre> + * {@code + * services: + * - type: cluster + * id: cluster + * brooklyn.config: + * memberSpec: + * $brooklyn:entitySpec: + * type: org.apache.brooklyn.entity.webapp.tomcat.TomcatServer + * brooklyn.enrichers: + * - type: org.apache.brooklyn.core.location.access.PublicNetworkFaceEnricher + * brooklyn.config: + * sensor: main.uri + * - type: org.apache.brooklyn.entity.proxy.nginx.NginxController + * brooklyn.config: + * member.sensor.hostandport: $brooklyn:sensor("main.uri.mapped.public") + * serverPool: cluster + * } + * </pre> + */ +@Beta +public class OnPublicNetworkEnricher extends AbstractEnricher { + + // TODO Is this the best package for the enricher? + // + // TODO Need more logging, particularly for when the value has *not* been transformed. + // + // TODO What if the sensor has an unrelated hostname - we will currently still transform this! + // That seems acceptable: if the user configures it to look at the sensor, then we can make + // assumptions that the sensor's value will need translated. + // + // TODO If there is no port-mapping, should we advertise the original sensor value? + // That would allow the enricher to be used for an entity in a private network, and for + // it to be a no-op in a public cloud (so the same blueprint can be used in both). + // However I don't think we should publish the original value: it could be the association + // just hasn't been created yet. If we publish the wrong (i.e. untransformed) value, that + // will cause other entity's using attributeWhenReady to immediately trigger. + + private static final Logger LOG = LoggerFactory.getLogger(OnPublicNetworkEnricher.class); + + @SuppressWarnings("serial") + public static final ConfigKey<AttributeSensor<?>> SENSOR = ConfigKeys.newConfigKey( + new TypeToken<AttributeSensor<?>>() {}, + "sensor", + "The sensor whose mapped value is to be re-published (with suffix \"mapped.public\"); " + + "either 'sensor' or 'sensors' should be specified"); + + @SuppressWarnings("serial") + public static ConfigKey<Collection<? extends AttributeSensor<?>>> SENSORS = ConfigKeys.newConfigKey( + new TypeToken<Collection<? extends AttributeSensor<?>>>() {}, + "sensors", + "The multiple sensors whose mapped values are to be re-published (with suffix \"mapped.public\"); " + + "if neither 'sensor' or 'sensors' is specified, defaults to 'mapAll'"); + + public static ConfigKey<String> MAP_MATCHING = ConfigKeys.newStringConfigKey( + "mapMatching", + "Whether to map all, based on a sensor naming convention (re-published with suffix \"mapped.public\"); " + + "if neither 'sensor' or 'sensors' is specified, defaults to matchin case-insensitive suffix of " + + "'port', 'uri', 'url' or 'endpoint' ", + "(?i).*(port|uri|url|endpoint)"); + + @SuppressWarnings("serial") + public static ConfigKey<Function<? super String, String>> SENSOR_NAME_CONVERTER = ConfigKeys.newConfigKey( + new TypeToken<Function<? super String, String>>() {}, + "sensorNameConverter", + "The converter to use, to map from the original sensor name to the re-published sensor name", + new SensorNameConverter("public")); + + public static final ConfigKey<PortForwardManager> PORT_FORWARD_MANAGER = ConfigKeys.newConfigKey( + PortForwardManager.class, + "portForwardManager", + "The PortForwardManager storing the port-mappings; if null, the global instance will be used"); + + public static class SensorNameConverter implements Function<String, String> { + private final String network; + + public SensorNameConverter(String network) { + this.network = network; + } + + @Override + public String apply(String input) { + if (input == null) throw new NullPointerException("Sensor name must not be null"); + String lowerInput = input.toLowerCase(); + if (lowerInput.endsWith("uri")) { + return input + ".mapped." + network; + } else if (lowerInput.endsWith("url")) { + return input + ".mapped." + network; + } else if (lowerInput.endsWith("endpoint")) { + return input + ".mapped." + network; + } else if (lowerInput.endsWith("port")) { + String prefix = input.substring(0, input.length() - "port".length()); + if (prefix.endsWith(".")) prefix = prefix.substring(0, prefix.length() - 1); + return prefix + ".endpoint.mapped." + network; + } else { + return input + ".mapped." + network; + } + } + } + + protected Collection<AttributeSensor<?>> sensors; + protected Optional<Predicate<Sensor<?>>> mapMatching; + protected Function<? super String, String> sensorNameConverter; + protected PortForwardManager.AssociationListener pfmListener; + + @Override + public void setEntity(final EntityLocal entity) { + super.setEntity(entity); + + checkConfig(); + sensors = resolveSensorsConfig(); + if (sensors.isEmpty()) { + mapMatching = Optional.of(resolveMapMatchingConfig()); + } else { + mapMatching = Optional.absent(); + } + sensorNameConverter = getRequiredConfig(SENSOR_NAME_CONVERTER); + + /* + * To find the transformed sensor value we need several things to be set. Therefore + * subscribe to all of them, and re-compute whenever any of the change. These are: + * - A port-mapping to exist for the relevant machine + private port. + * - The entity to have a machine location (so we can lookup the mapped port association). + * - The relevant sensors to have a value, which includes the private port. + */ + pfmListener = new PortForwardManager.AssociationListener() { + @Override + public void onAssociationCreated(PortForwardManager.AssociationMetadata metadata) { + Maybe<MachineLocation> machine = getMachine(); + if (!(machine.isPresent() && machine.get().equals(metadata.getLocation()))) { + // not related to this entity's machine; ignoring + return; + } + + LOG.debug("{} attempting transformations, triggered by port-association {}, with machine {} of entity {}", + new Object[] {OnPublicNetworkEnricher.this, metadata, machine.get(), entity}); + tryTransformAll(); + } + @Override + public void onAssociationDeleted(PortForwardManager.AssociationMetadata metadata) { + // no-op + } + }; + getPortForwardManager().addAssociationListener(pfmListener, Predicates.alwaysTrue()); + + subscriptions().subscribe(entity, AbstractEntity.LOCATION_ADDED, new SensorEventListener<Location>() { + @Override public void onEvent(SensorEvent<Location> event) { + LOG.debug("{} attempting transformations, triggered by location-added {}, to {}", new Object[] {OnPublicNetworkEnricher.this, event.getValue(), entity}); + tryTransformAll(); + }}); + + for (AttributeSensor<?> sensor : sensors) { + subscriptions().subscribe(entity, sensor, new SensorEventListener<Object>() { + @Override public void onEvent(SensorEvent<Object> event) { + LOG.debug("{} attempting transformations, triggered by sensor-event {}->{}, to {}", + new Object[] {OnPublicNetworkEnricher.this, event.getSensor().getName(), event.getValue(), entity}); + tryTransform((AttributeSensor<?>)event.getSensor()); + }}); + } + if (mapMatching.isPresent()) { + Sensor<?> wildcardSensor = null; + subscriptions().subscribe(entity, wildcardSensor, new SensorEventListener<Object>() { + @Override public void onEvent(SensorEvent<Object> event) { + if (mapMatching.get().apply(event.getSensor())) { + LOG.debug("{} attempting transformations, triggered by sensor-event {}->{}, to {}", + new Object[] {OnPublicNetworkEnricher.this, event.getSensor().getName(), event.getValue(), entity}); + tryTransform((AttributeSensor<?>)event.getSensor()); + } + }}); + } + + tryTransformAll(); + } + + @Override + public void destroy() { + try { + if (pfmListener != null) { + getPortForwardManager().removeAssociationListener(pfmListener); + } + } finally { + super.destroy(); + } + } + + protected void tryTransformAll() { + if (!isRunning()) { + return; + } + Maybe<MachineLocation> machine = getMachine(); + if (machine.isAbsent()) { + return; + } + for (AttributeSensor<?> sensor : sensors) { + try { + tryTransform(machine.get(), sensor); + } catch (Exception e) { + // TODO Avoid repeated logging + Exceptions.propagateIfFatal(e); + LOG.warn("Problem transforming sensor "+sensor+" of "+entity, e); + } + } + if (mapMatching.isPresent()) { + for (Sensor<?> sensor : entity.getEntityType().getSensors()) { + if (sensor instanceof AttributeSensor && mapMatching.get().apply(sensor)) { + try { + tryTransform(machine.get(), (AttributeSensor<?>)sensor); + } catch (Exception e) { + // TODO Avoid repeated logging + Exceptions.propagateIfFatal(e); + LOG.warn("Problem transforming sensor "+sensor+" of "+entity, e); + } + } + } + } + } + + protected void tryTransform(AttributeSensor<?> sensor) { + if (!isRunning()) { + return; + } + Maybe<MachineLocation> machine = getMachine(); + if (machine.isAbsent()) { + return; + } + tryTransform(machine.get(), sensor); + } + + protected void tryTransform(MachineLocation machine, AttributeSensor<?> sensor) { + Object sensorVal = entity.sensors().get(sensor); + if (sensorVal == null) { + return; + } + Maybe<String> newVal = transformVal(machine, sensor, sensorVal); + if (newVal.isAbsent()) { + return; + } + AttributeSensor<String> mappedSensor = Sensors.newStringSensor(sensorNameConverter.apply(sensor.getName())); + if (newVal.get().equals(entity.sensors().get(mappedSensor))) { + // ignore duplicate + return; + } + LOG.debug("{} publishing value {} for transformed sensor {}, of entity {}", + new Object[] {this, newVal.get(), sensor, entity}); + entity.sensors().set(mappedSensor, newVal.get()); + } + + protected Maybe<String> transformVal(MachineLocation machine, AttributeSensor<?> sensor, Object sensorVal) { + if (sensorVal == null) { + return Maybe.absent(); + } else if (isPort(sensorVal)) { + int port = toInteger(sensorVal); + return transformPort(entity, machine, port); + } else if (isUri(sensorVal)) { + return transformUri(entity, machine, sensorVal.toString()); + } else if (isHostAndPort(sensorVal)) { + return transformHostAndPort(entity, machine, sensorVal.toString()); + } else { + // no-op; unrecognised type + return Maybe.absent(); + } + } + + protected boolean isUri(Object sensorVal) { + if (sensorVal instanceof URI || sensorVal instanceof URL) { + return true; + } + try { + URI uri = new URI(sensorVal.toString()); + return uri.getScheme() != null; + } catch (URISyntaxException e) { + return false; + } + } + + protected boolean isPort(Object sensorVal) { + if (sensorVal instanceof Integer || sensorVal instanceof Long) { + return Networking.isPortValid(((Number)sensorVal).intValue()); + } else if (sensorVal instanceof CharSequence) { + return sensorVal.toString().trim().matches("[0-9]+"); + } else { + return false; + } + } + + protected int toInteger(Object sensorVal) { + if (sensorVal instanceof Number) { + return ((Number)sensorVal).intValue(); + } else if (sensorVal instanceof CharSequence) { + return Integer.parseInt(sensorVal.toString().trim()); + } else { + throw new IllegalArgumentException("Expected number but got "+sensorVal+" of type "+(sensorVal != null ? sensorVal.getClass() : null)); + } + } + + protected boolean isHostAndPort(Object sensorVal) { + if (sensorVal instanceof HostAndPort) { + return true; + } else if (sensorVal instanceof String) { + try { + HostAndPort hostAndPort = HostAndPort.fromString((String)sensorVal); + return hostAndPort.hasPort(); + } catch (IllegalArgumentException e) { + return false; + } + } + return false; + } + + protected Maybe<String> transformUri(Entity source, MachineLocation machine, String sensorVal) { + URI uri = URI.create(sensorVal); + int port = uri.getPort(); + if (port == -1 && "http".equalsIgnoreCase(uri.getScheme())) port = 80; + if (port == -1 && "https".equalsIgnoreCase(uri.getScheme())) port = 443; + + if (port != -1) { + HostAndPort publicTarget = getPortForwardManager().lookup(machine, port); + if (publicTarget == null) { + LOG.trace("network-facing enricher not transforming {} URI {}, because no port-mapping for {}", new Object[] {source, sensorVal, machine}); + return Maybe.absent(); + } + if (!publicTarget.hasPort()) { + LOG.debug("network-facing enricher not transforming {} URI {}, because no port in public-target {} for {}", new Object[] {source, sensorVal, publicTarget, machine}); + return Maybe.absent(); + } + URI result; + try { + result = new URI(uri.getScheme(), uri.getUserInfo(), publicTarget.getHostText(), publicTarget.getPort(), uri.getPath(), uri.getQuery(), uri.getFragment()); + } catch (URISyntaxException e) { + LOG.debug("Error transforming URI "+uri+", using target "+publicTarget+"; rethrowing"); + throw Exceptions.propagateAnnotated("Error transforming URI "+uri+", using target "+publicTarget, e); + } + return Maybe.of(result.toString()); + } else { + LOG.debug("sensor mapper not transforming URI "+uri+" because no port defined"); + return Maybe.absent(); + } + } + + protected Maybe<String> transformHostAndPort(Entity source, MachineLocation machine, String sensorVal) { + HostAndPort hostAndPort = HostAndPort.fromString(sensorVal); + if (hostAndPort.hasPort()) { + int port = hostAndPort.getPort(); + HostAndPort publicTarget = getPortForwardManager().lookup(machine, port); + if (publicTarget == null) { + LOG.debug("network-facing enricher not transforming {} host-and-port {}, because no port-mapping for {}", new Object[] {source, sensorVal, machine}); + return Maybe.absent(); + } + return Maybe.of(publicTarget.toString()); + } else { + LOG.debug("network-facing enricher not transforming {} host-and-port {} because defines no port", source, hostAndPort); + return Maybe.absent(); + } + } + + protected Maybe<String> transformPort(Entity source, MachineLocation machine, int sensorVal) { + if (Networking.isPortValid(sensorVal)) { + HostAndPort publicTarget = getPortForwardManager().lookup(machine, sensorVal); + if (publicTarget == null) { + LOG.debug("network-facing enricher not transforming {} host-and-port {}, because no port-mapping for {}", new Object[] {source, sensorVal, machine}); + return Maybe.absent(); + } + return Maybe.of(publicTarget.toString()); + } else { + LOG.debug("network-facing enricher not transforming {} port {} because not a valid port", source, sensorVal); + return Maybe.absent(); + } + } + + protected Maybe<MachineLocation> getMachine() { + return Machines.findUniqueMachineLocation(entity.getLocations()); + } + + protected PortForwardManager getPortForwardManager() { + PortForwardManager portForwardManager = config().get(PORT_FORWARD_MANAGER); + if (portForwardManager == null) { + portForwardManager = (PortForwardManager) getManagementContext().getLocationRegistry().getLocationManaged(PortForwardManagerLocationResolver.PFM_GLOBAL_SPEC); + } + return portForwardManager; + } + + protected void checkConfig() { + AttributeSensor<?> sensor = getConfig(SENSOR); + Collection<? extends AttributeSensor<?>> sensors = getConfig(SENSORS); + Maybe<Object> rawMapMatching = config().getRaw(MAP_MATCHING); + String mapMatching = config().get(MAP_MATCHING); + + if (sensor != null && sensors != null && sensors.isEmpty()) { --- End diff -- Good spot! Have added tests as well.
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