Github user neykov commented on a diff in the pull request:
https://github.com/apache/brooklyn-server/pull/192#discussion_r66622693
--- Diff:
core/src/main/java/org/apache/brooklyn/core/network/AbstractOnNetworkEnricher.java
---
@@ -0,0 +1,402 @@
+/*
+ * 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.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.collect.Lists;
+import com.google.common.net.HostAndPort;
+import com.google.common.reflect.TypeToken;
+
+@Beta
+public abstract class AbstractOnNetworkEnricher extends AbstractEnricher {
+
+ private static final Logger LOG =
LoggerFactory.getLogger(AbstractOnNetworkEnricher.class);
+
+ @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.networkName\"); "
+ + "if 'sensors' is not specified, defaults to
'mapMatching'");
+
+ public static ConfigKey<String> MAP_MATCHING =
ConfigKeys.newStringConfigKey(
+ "mapMatching",
+ "Whether to map all, based on a sensor naming convention
(re-published with suffix \"mapped.networkName\"); "
+ + "if 'sensors' is not specified, defaults to matching
case-insensitive suffix of "
+ + "'port', 'uri', 'url', 'endpoint' or 'hostAndPort'",
+ "(?i)(.+\\.)?(port|uri|url|endpoint|hostandport)");
+
+ @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");
+
+ 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("hostandport")) {
+ return input + ".mapped." + network;
+ } else if (lowerInput.endsWith("port")) {
+ String prefix = input.substring(0, input.length() -
"port".length());
+ boolean includeDot = (!prefix.isEmpty() &&
!prefix.endsWith("."));
+ return prefix + (includeDot ? "." : "") +
"endpoint.mapped." + network;
+ } else {
+ return input + ".mapped." + network;
+ }
+ }
+
+ @Override
+ public String toString() {
+ return getClass().getSimpleName()+"("+network+")";
+ }
+ }
+
+ protected Collection<AttributeSensor<?>> sensors;
+ protected Optional<Predicate<Sensor<?>>> mapMatching;
+ protected Function<? super String, String> sensorNameConverter;
+ protected PortForwardManager.AssociationListener pfmListener;
+
+ protected abstract Optional<HostAndPort> getMappedEndpoint(Entity
source, MachineLocation machine, int port);
+
+ @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);
+
+ 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[] {AbstractOnNetworkEnricher.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[] {AbstractOnNetworkEnricher.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[]
{AbstractOnNetworkEnricher.this, event.getSensor().getName(), event.getValue(),
entity});
+
tryTransform((AttributeSensor<?>)event.getSensor());
+ }
+ }});
+ }
+
+ tryTransformAll();
+ }
+
+ 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 {} (original sensor value {}) for
mapped sensor {}, of entity {}",
+ new Object[] {this, newVal.get(), sensorVal, mappedSensor,
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) {
+ String val = sensorVal.toString().trim();
+ return val.matches("[0-9]+") && val.length() <= 5
+ && Networking.isPortValid(Integer.parseInt(val));
+
+ } 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) {
+ Optional<HostAndPort> mappedEndpoint =
getMappedEndpoint(source, machine, port);
+ if (!mappedEndpoint.isPresent()) {
+ LOG.trace("network-facing enricher not transforming {} URI
{}, because no port-mapping for {}", new Object[] {source, sensorVal, machine});
+ return Maybe.absent();
+ }
+ if (!mappedEndpoint.get().hasPort()) {
+ LOG.debug("network-facing enricher not transforming {} URI
{}, because no port in target {} for {}", new Object[] {source, sensorVal,
mappedEndpoint, machine});
+ return Maybe.absent();
+ }
+ URI result;
+ try {
+ result = new URI(uri.getScheme(), uri.getUserInfo(),
mappedEndpoint.get().getHostText(), mappedEndpoint.get().getPort(),
uri.getPath(), uri.getQuery(), uri.getFragment());
+ } catch (URISyntaxException e) {
+ LOG.debug("Error transforming URI "+uri+", using target
"+mappedEndpoint+"; rethrowing");
+ throw Exceptions.propagateAnnotated("Error transforming
URI "+uri+", using target "+mappedEndpoint, 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();
+ Optional<HostAndPort> mappedEndpoint =
getMappedEndpoint(source, machine, port);
+ if (!mappedEndpoint.isPresent()) {
+ LOG.debug("network-facing enricher not transforming {}
host-and-port {}, because no port-mapping for {}", new Object[] {source,
sensorVal, machine});
+ return Maybe.absent();
+ }
+ if (!mappedEndpoint.get().hasPort()) {
+ LOG.debug("network-facing enricher not transforming {}
host-and-port {}, because no port in target {} for {}", new Object[] {source,
sensorVal, mappedEndpoint, machine});
+ return Maybe.absent();
+ }
+ return Maybe.of(mappedEndpoint.get().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)) {
+ Optional<HostAndPort> mappedEndpoint =
getMappedEndpoint(source, machine, sensorVal);
+ if (!mappedEndpoint.isPresent()) {
+ LOG.debug("network-facing enricher not transforming {}
port {}, because no port-mapping for {}", new Object[] {source, sensorVal,
machine});
+ return Maybe.absent();
+ }
+ if (!mappedEndpoint.get().hasPort()) {
+ LOG.debug("network-facing enricher not transforming {}
port {}, because no port in target {} for {}", new Object[] {source, sensorVal,
mappedEndpoint, machine});
+ return Maybe.absent();
+ }
+ return Maybe.of(mappedEndpoint.get().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 void checkConfig() {
+ Collection<? extends AttributeSensor<?>> sensors =
getConfig(SENSORS);
+ Maybe<Object> rawMapMatching = config().getRaw(MAP_MATCHING);
+ String mapMatching = config().get(MAP_MATCHING);
+
+ if (sensors == null || sensors.isEmpty()) {
+ if (Strings.isBlank(mapMatching)) {
+ throw new IllegalStateException(this+" requires 'sensors'
config (when 'mapMatching' is explicitly blank)");
+ }
+ } else if (rawMapMatching.isPresent()) {
+ throw new IllegalStateException(this+" must not have explicit
'mapMatching' and 'sensors' config");
+ }
+ }
+
+ protected Collection<AttributeSensor<?>> resolveSensorsConfig() {
+ Collection<? extends AttributeSensor<?>> sensors =
getConfig(SENSORS);
--- End diff --
Could've gone one step further and accept both `String` and `List` after
removing `SENSOR`.
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