Using provider pattern for cluster metadata.
Change-Id: I5a572b3df9149be959dde9868a9c594dec26a3e0
diff --git a/core/net/src/main/java/org/onosproject/cluster/impl/ClusterManager.java b/core/net/src/main/java/org/onosproject/cluster/impl/ClusterManager.java
index 9444969..1dcff08 100644
--- a/core/net/src/main/java/org/onosproject/cluster/impl/ClusterManager.java
+++ b/core/net/src/main/java/org/onosproject/cluster/impl/ClusterManager.java
@@ -42,7 +42,6 @@
import org.slf4j.Logger;
import com.google.common.collect.Collections2;
-import com.google.common.collect.Lists;
import com.google.common.collect.Sets;
import java.util.ArrayList;
@@ -139,11 +138,7 @@
checkNotNull(nodes, "Nodes cannot be null");
checkArgument(!nodes.isEmpty(), "Nodes cannot be empty");
- ClusterMetadata metadata = ClusterMetadata.builder()
- .withName("default")
- .withControllerNodes(nodes)
- .withPartitions(buildDefaultPartitions(nodes))
- .build();
+ ClusterMetadata metadata = new ClusterMetadata("default", nodes, buildDefaultPartitions(nodes));
clusterMetadataAdminService.setClusterMetadata(metadata);
try {
log.warn("Shutting down container for cluster reconfiguration!");
@@ -175,10 +170,10 @@
}
}
- private static Collection<Partition> buildDefaultPartitions(Collection<ControllerNode> nodes) {
+ private static Set<Partition> buildDefaultPartitions(Collection<ControllerNode> nodes) {
List<ControllerNode> sorted = new ArrayList<>(nodes);
Collections.sort(sorted, (o1, o2) -> o1.id().toString().compareTo(o2.id().toString()));
- Collection<Partition> partitions = Lists.newArrayList();
+ Set<Partition> partitions = Sets.newHashSet();
// add p0 partition
partitions.add(new DefaultPartition(PartitionId.from(0),
Sets.newHashSet(Collections2.transform(nodes, ControllerNode::id))));
diff --git a/core/net/src/main/java/org/onosproject/cluster/impl/ClusterMetadataManager.java b/core/net/src/main/java/org/onosproject/cluster/impl/ClusterMetadataManager.java
index 1bb2182..49a24db 100644
--- a/core/net/src/main/java/org/onosproject/cluster/impl/ClusterMetadataManager.java
+++ b/core/net/src/main/java/org/onosproject/cluster/impl/ClusterMetadataManager.java
@@ -21,81 +21,117 @@
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
+import java.net.URI;
+import java.net.URISyntaxException;
import java.util.Collection;
import java.util.Enumeration;
import org.apache.felix.scr.annotations.Activate;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Deactivate;
-import org.apache.felix.scr.annotations.Reference;
-import org.apache.felix.scr.annotations.ReferenceCardinality;
import org.apache.felix.scr.annotations.Service;
import org.onlab.packet.IpAddress;
import org.onosproject.cluster.ClusterMetadata;
import org.onosproject.cluster.ClusterMetadataAdminService;
import org.onosproject.cluster.ClusterMetadataEvent;
import org.onosproject.cluster.ClusterMetadataEventListener;
+import org.onosproject.cluster.ClusterMetadataProvider;
+import org.onosproject.cluster.ClusterMetadataProviderRegistry;
+import org.onosproject.cluster.ClusterMetadataProviderService;
import org.onosproject.cluster.ClusterMetadataService;
-import org.onosproject.cluster.ClusterMetadataStore;
-import org.onosproject.cluster.ClusterMetadataStoreDelegate;
import org.onosproject.cluster.ControllerNode;
-import org.onosproject.event.AbstractListenerManager;
+import org.onosproject.cluster.NodeId;
+import org.onosproject.cluster.PartitionId;
+import org.onosproject.net.provider.AbstractListenerProviderRegistry;
+import org.onosproject.net.provider.AbstractProviderService;
import org.onosproject.store.service.Versioned;
import org.slf4j.Logger;
+import com.google.common.base.Throwables;
+
/**
* Implementation of ClusterMetadataService.
*/
@Component(immediate = true)
@Service
public class ClusterMetadataManager
- extends AbstractListenerManager<ClusterMetadataEvent, ClusterMetadataEventListener>
- implements ClusterMetadataService, ClusterMetadataAdminService {
+ extends AbstractListenerProviderRegistry<ClusterMetadataEvent,
+ ClusterMetadataEventListener,
+ ClusterMetadataProvider,
+ ClusterMetadataProviderService>
+ implements ClusterMetadataService, ClusterMetadataAdminService, ClusterMetadataProviderRegistry {
private final Logger log = getLogger(getClass());
private ControllerNode localNode;
- private ClusterMetadataStoreDelegate delegate = new InternalStoreDelegate();
-
- @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
- protected ClusterMetadataStore store;
-
@Activate
public void activate() {
- store.setDelegate(delegate);
+ // FIXME: Need to ensure all cluster metadata providers are registered before we activate
eventDispatcher.addSink(ClusterMetadataEvent.class, listenerRegistry);
- establishSelfIdentity();
log.info("Started");
}
@Deactivate
public void deactivate() {
- store.unsetDelegate(delegate);
eventDispatcher.removeSink(ClusterMetadataEvent.class);
log.info("Stopped");
}
@Override
public ClusterMetadata getClusterMetadata() {
- return Versioned.valueOrElse(store.getClusterMetadata(), null);
+ Versioned<ClusterMetadata> metadata = getProvider().getClusterMetadata();
+ return metadata.value();
+ }
+
+
+ @Override
+ protected ClusterMetadataProviderService createProviderService(
+ ClusterMetadataProvider provider) {
+ return new InternalClusterMetadataProviderService(provider);
}
@Override
public ControllerNode getLocalNode() {
+ if (localNode == null) {
+ establishSelfIdentity();
+ }
return localNode;
}
@Override
public void setClusterMetadata(ClusterMetadata metadata) {
checkNotNull(metadata, "Cluster metadata cannot be null");
- store.setClusterMetadata(metadata);
+ ClusterMetadataProvider primaryProvider = getPrimaryProvider();
+ if (primaryProvider == null) {
+ throw new IllegalStateException("Missing primary provider. Cannot update cluster metadata");
+ }
+ primaryProvider.setClusterMetadata(metadata);
}
- // Store delegate to re-post events emitted from the store.
- private class InternalStoreDelegate implements ClusterMetadataStoreDelegate {
- @Override
- public void notify(ClusterMetadataEvent event) {
- post(event);
+ /**
+ * Returns the provider to use for fetching cluster metadata.
+ * @return cluster metadata provider
+ */
+ private ClusterMetadataProvider getProvider() {
+ ClusterMetadataProvider primaryProvider = getPrimaryProvider();
+ if (primaryProvider != null && primaryProvider.isAvailable()) {
+ return primaryProvider;
+ }
+ log.warn("Primary cluster metadata provider not available. Using default fallback.");
+ return getProvider("default");
+ }
+
+ /**
+ * Returns the primary provider for cluster metadata.
+ * @return primary cluster metadata provider
+ */
+ private ClusterMetadataProvider getPrimaryProvider() {
+ try {
+ URI uri = new URI(System.getProperty("onos.cluster.metadata.uri", "config:///cluster.json"));
+ return getProvider(uri.getScheme());
+ } catch (URISyntaxException e) {
+ Throwables.propagate(e);
+ return null;
}
}
@@ -129,4 +165,25 @@
throw new IllegalStateException("Cannot determine local IP", e);
}
}
+
+ private class InternalClusterMetadataProviderService
+ extends AbstractProviderService<ClusterMetadataProvider>
+ implements ClusterMetadataProviderService {
+
+ InternalClusterMetadataProviderService(ClusterMetadataProvider provider) {
+ super(provider);
+ }
+
+ @Override
+ public void clusterMetadataChanged(Versioned<ClusterMetadata> newMetadata) {
+ log.info("Cluster metadata changed. New metadata: {}", newMetadata);
+ post(new ClusterMetadataEvent(ClusterMetadataEvent.Type.METADATA_CHANGED, newMetadata.value()));
+ }
+
+ @Override
+ public void newActiveMemberForPartition(PartitionId partitionId, NodeId nodeId) {
+ log.info("Node {} is active member for partition {}", nodeId, partitionId);
+ // TODO: notify listeners
+ }
+ }
}
\ No newline at end of file
diff --git a/core/net/src/main/java/org/onosproject/cluster/impl/ConfigFileBasedClusterMetadataProvider.java b/core/net/src/main/java/org/onosproject/cluster/impl/ConfigFileBasedClusterMetadataProvider.java
new file mode 100644
index 0000000..825aa0a
--- /dev/null
+++ b/core/net/src/main/java/org/onosproject/cluster/impl/ConfigFileBasedClusterMetadataProvider.java
@@ -0,0 +1,235 @@
+/*
+ * Copyright 2015-2016 Open Networking Laboratory
+ *
+ * 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.onosproject.cluster.impl;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Set;
+import java.util.concurrent.atomic.AtomicReference;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.onlab.packet.IpAddress;
+import org.onosproject.cluster.ClusterMetadata;
+import org.onosproject.cluster.ClusterMetadataProvider;
+import org.onosproject.cluster.ClusterMetadataProviderRegistry;
+import org.onosproject.cluster.ClusterMetadataProviderService;
+import org.onosproject.cluster.ControllerNode;
+import org.onosproject.cluster.DefaultControllerNode;
+import org.onosproject.cluster.DefaultPartition;
+import org.onosproject.cluster.NodeId;
+import org.onosproject.cluster.Partition;
+import org.onosproject.cluster.PartitionId;
+import org.onosproject.net.provider.ProviderId;
+import org.onosproject.store.service.Versioned;
+import org.slf4j.Logger;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonDeserializer;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.JsonSerializer;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.module.SimpleModule;
+import com.google.common.base.Throwables;
+import com.google.common.collect.Sets;
+import com.google.common.io.Files;
+
+import static com.google.common.base.Preconditions.checkState;
+
+/**
+ * Provider of {@link ClusterMetadata cluster metadata} sourced from a local config file.
+ */
+@Component(immediate = true)
+public class ConfigFileBasedClusterMetadataProvider implements ClusterMetadataProvider {
+
+ private final Logger log = getLogger(getClass());
+
+ // constants for filed names (used in serialization)
+ private static final String ID = "id";
+ private static final String PORT = "port";
+ private static final String IP = "ip";
+
+ private static final File CONFIG_FILE = new File("../config/cluster.json");
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected ClusterMetadataProviderRegistry providerRegistry;
+
+ private static final ProviderId PROVIDER_ID = new ProviderId("config", "none");
+ private AtomicReference<Versioned<ClusterMetadata>> cachedMetadata = new AtomicReference<>();
+
+ private ObjectMapper mapper;
+ private ClusterMetadataProviderService providerService;
+
+ @Activate
+ public void activate() {
+ mapper = new ObjectMapper();
+ SimpleModule module = new SimpleModule();
+ module.addSerializer(NodeId.class, new NodeIdSerializer());
+ module.addDeserializer(NodeId.class, new NodeIdDeserializer());
+ module.addSerializer(ControllerNode.class, new ControllerNodeSerializer());
+ module.addDeserializer(ControllerNode.class, new ControllerNodeDeserializer());
+ module.addDeserializer(Partition.class, new PartitionDeserializer());
+ module.addSerializer(PartitionId.class, new PartitionIdSerializer());
+ module.addDeserializer(PartitionId.class, new PartitionIdDeserializer());
+ mapper.registerModule(module);
+ providerService = providerRegistry.register(this);
+ log.info("Started");
+ }
+
+ @Deactivate
+ public void deactivate() {
+ providerRegistry.unregister(this);
+ log.info("Stopped");
+ }
+
+ @Override
+ public ProviderId id() {
+ return PROVIDER_ID;
+ }
+
+ @Override
+ public Versioned<ClusterMetadata> getClusterMetadata() {
+ checkState(isAvailable());
+ synchronized (this) {
+ if (cachedMetadata.get() == null) {
+ loadMetadata();
+ }
+ return cachedMetadata.get();
+ }
+ }
+
+ @Override
+ public void setClusterMetadata(ClusterMetadata metadata) {
+ try {
+ Files.createParentDirs(CONFIG_FILE);
+ mapper.writeValue(CONFIG_FILE, metadata);
+ providerService.clusterMetadataChanged(new Versioned<>(metadata, CONFIG_FILE.lastModified()));
+ } catch (IOException e) {
+ Throwables.propagate(e);
+ }
+ }
+
+ @Override
+ public void addActivePartitionMember(PartitionId partitionId, NodeId nodeId) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public void removeActivePartitionMember(PartitionId partitionId, NodeId nodeId) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public Set<NodeId> getActivePartitionMembers(PartitionId partitionId) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public boolean isAvailable() {
+ return CONFIG_FILE.exists();
+ }
+
+ private void loadMetadata() {
+ ClusterMetadata metadata = null;
+ long version = 0;
+ try {
+ metadata = mapper.readValue(CONFIG_FILE, ClusterMetadata.class);
+ version = metadata.hashCode();
+ } catch (IOException e) {
+ Throwables.propagate(e);
+ }
+ cachedMetadata.set(new Versioned<>(new ClusterMetadata(PROVIDER_ID,
+ metadata.getName(),
+ Sets.newHashSet(metadata.getNodes()),
+ Sets.newHashSet(metadata.getPartitions())),
+ version));
+ }
+
+ private static class PartitionDeserializer extends JsonDeserializer<Partition> {
+ @Override
+ public Partition deserialize(JsonParser jp, DeserializationContext ctxt)
+ throws IOException, JsonProcessingException {
+ return jp.readValueAs(DefaultPartition.class);
+ }
+ }
+
+ private static class PartitionIdSerializer extends JsonSerializer<PartitionId> {
+ @Override
+ public void serialize(PartitionId partitionId, JsonGenerator jgen, SerializerProvider provider)
+ throws IOException, JsonProcessingException {
+ jgen.writeNumber(partitionId.asInt());
+ }
+ }
+
+ private class PartitionIdDeserializer extends JsonDeserializer<PartitionId> {
+ @Override
+ public PartitionId deserialize(JsonParser jp, DeserializationContext ctxt)
+ throws IOException, JsonProcessingException {
+ JsonNode node = jp.getCodec().readTree(jp);
+ return new PartitionId(node.asInt());
+ }
+ }
+
+ private static class ControllerNodeSerializer extends JsonSerializer<ControllerNode> {
+ @Override
+ public void serialize(ControllerNode node, JsonGenerator jgen, SerializerProvider provider)
+ throws IOException, JsonProcessingException {
+ jgen.writeStartObject();
+ jgen.writeStringField(ID, node.id().toString());
+ jgen.writeStringField(IP, node.ip().toString());
+ jgen.writeNumberField(PORT, node.tcpPort());
+ jgen.writeEndObject();
+ }
+ }
+
+ private static class ControllerNodeDeserializer extends JsonDeserializer<ControllerNode> {
+ @Override
+ public ControllerNode deserialize(JsonParser jp, DeserializationContext ctxt)
+ throws IOException, JsonProcessingException {
+ JsonNode node = jp.getCodec().readTree(jp);
+ NodeId nodeId = new NodeId(node.get(ID).textValue());
+ IpAddress ip = IpAddress.valueOf(node.get(IP).textValue());
+ int port = node.get(PORT).asInt();
+ return new DefaultControllerNode(nodeId, ip, port);
+ }
+ }
+
+ private static class NodeIdSerializer extends JsonSerializer<NodeId> {
+ @Override
+ public void serialize(NodeId nodeId, JsonGenerator jgen, SerializerProvider provider)
+ throws IOException, JsonProcessingException {
+ jgen.writeString(nodeId.toString());
+ }
+ }
+
+ private class NodeIdDeserializer extends JsonDeserializer<NodeId> {
+ @Override
+ public NodeId deserialize(JsonParser jp, DeserializationContext ctxt)
+ throws IOException, JsonProcessingException {
+ JsonNode node = jp.getCodec().readTree(jp);
+ return new NodeId(node.asText());
+ }
+ }
+}
\ No newline at end of file
diff --git a/core/net/src/main/java/org/onosproject/cluster/impl/DefaultClusterMetadataProvider.java b/core/net/src/main/java/org/onosproject/cluster/impl/DefaultClusterMetadataProvider.java
new file mode 100644
index 0000000..7566e48
--- /dev/null
+++ b/core/net/src/main/java/org/onosproject/cluster/impl/DefaultClusterMetadataProvider.java
@@ -0,0 +1,186 @@
+/*
+ * Copyright 2015-2016 Open Networking Laboratory
+ *
+ * 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.onosproject.cluster.impl;
+
+import static java.net.NetworkInterface.getNetworkInterfaces;
+import static org.slf4j.LoggerFactory.getLogger;
+
+import java.net.Inet4Address;
+import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.util.Collections;
+import java.util.Set;
+import java.util.concurrent.atomic.AtomicReference;
+import java.util.function.Function;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.onlab.packet.IpAddress;
+import org.onosproject.cluster.ClusterMetadata;
+import org.onosproject.cluster.ClusterMetadataProvider;
+import org.onosproject.cluster.ClusterMetadataProviderRegistry;
+import org.onosproject.cluster.ControllerNode;
+import org.onosproject.cluster.DefaultControllerNode;
+import org.onosproject.cluster.DefaultPartition;
+import org.onosproject.cluster.NodeId;
+import org.onosproject.cluster.Partition;
+import org.onosproject.cluster.PartitionId;
+import org.onosproject.net.provider.ProviderId;
+import org.onosproject.store.service.Versioned;
+import org.slf4j.Logger;
+
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Sets;
+
+/**
+ * Provider of default {@link ClusterMetadata cluster metadata}.
+ */
+@Component(immediate = true)
+public class DefaultClusterMetadataProvider implements ClusterMetadataProvider {
+
+ private final Logger log = getLogger(getClass());
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected ClusterMetadataProviderRegistry providerRegistry;
+
+ private static final String ONOS_IP = "ONOS_IP";
+ private static final String ONOS_INTERFACE = "ONOS_INTERFACE";
+ private static final String ONOS_ALLOW_IPV6 = "ONOS_ALLOW_IPV6";
+ private static final String DEFAULT_ONOS_INTERFACE = "eth0";
+ private static final int DEFAULT_ONOS_PORT = 9876;
+ private static final ProviderId PROVIDER_ID = new ProviderId("default", "none");
+ private AtomicReference<Versioned<ClusterMetadata>> cachedMetadata = new AtomicReference<>();
+
+ @Activate
+ public void activate() {
+ String localIp = getSiteLocalAddress();
+ ControllerNode localNode =
+ new DefaultControllerNode(new NodeId(localIp), IpAddress.valueOf(localIp), DEFAULT_ONOS_PORT);
+ // p0 partition
+ Partition basePartition = new DefaultPartition(PartitionId.from(0), Sets.newHashSet(localNode.id()));
+ // p1 partition
+ Partition extendedPartition = new DefaultPartition(PartitionId.from(1), Sets.newHashSet(localNode.id()));
+ ClusterMetadata metadata = new ClusterMetadata(PROVIDER_ID,
+ "default",
+ ImmutableSet.of(localNode),
+ ImmutableSet.of(basePartition, extendedPartition));
+ long version = System.currentTimeMillis();
+ cachedMetadata.set(new Versioned<>(metadata, version));
+ providerRegistry.register(this);
+ log.info("Started");
+ }
+
+ @Deactivate
+ public void deactivate() {
+ providerRegistry.unregister(this);
+ log.info("Stopped");
+ }
+
+ @Override
+ public ProviderId id() {
+ return PROVIDER_ID;
+ }
+
+ @Override
+ public Versioned<ClusterMetadata> getClusterMetadata() {
+ return cachedMetadata.get();
+ }
+
+ @Override
+ public void setClusterMetadata(ClusterMetadata metadata) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public void addActivePartitionMember(PartitionId partitionId, NodeId nodeId) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public void removeActivePartitionMember(PartitionId partitionId, NodeId nodeId) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public Set<NodeId> getActivePartitionMembers(PartitionId partitionId) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
+ public boolean isAvailable() {
+ return true;
+ }
+
+ private static String getSiteLocalAddress() {
+
+ /*
+ * If the IP ONOS should use is set via the environment variable we will assume it is valid and should be used.
+ * Setting the IP address takes presidence over setting the interface via the environment.
+ */
+ String useOnosIp = System.getenv(ONOS_IP);
+ if (useOnosIp != null) {
+ return useOnosIp;
+ }
+
+ // Read environment variables for IP interface information or set to default
+ String useOnosInterface = System.getenv(ONOS_INTERFACE);
+ if (useOnosInterface == null) {
+ useOnosInterface = DEFAULT_ONOS_INTERFACE;
+ }
+
+ // Capture if they want to limit IP address selection to only IPv4 (default).
+ boolean allowIPv6 = (System.getenv(ONOS_ALLOW_IPV6) != null);
+
+ Function<NetworkInterface, IpAddress> ipLookup = nif -> {
+ IpAddress fallback = null;
+
+ // nif can be null if the interface name specified doesn't exist on the node's host
+ if (nif != null) {
+ for (InetAddress address : Collections.list(nif.getInetAddresses())) {
+ if (address.isSiteLocalAddress() && (allowIPv6 || address instanceof Inet4Address)) {
+ return IpAddress.valueOf(address);
+ }
+ if (fallback == null && !address.isLoopbackAddress() && !address.isMulticastAddress()
+ && (allowIPv6 || address instanceof Inet4Address)) {
+ fallback = IpAddress.valueOf(address);
+ }
+ }
+ }
+ return fallback;
+ };
+ try {
+ IpAddress ip = ipLookup.apply(NetworkInterface.getByName(useOnosInterface));
+ if (ip != null) {
+ return ip.toString();
+ }
+ for (NetworkInterface nif : Collections.list(getNetworkInterfaces())) {
+ if (!nif.getName().equals(useOnosInterface)) {
+ ip = ipLookup.apply(nif);
+ if (ip != null) {
+ return ip.toString();
+ }
+ }
+ }
+ } catch (Exception e) {
+ throw new IllegalStateException("Unable to get network interfaces", e);
+ }
+
+ return IpAddress.valueOf(InetAddress.getLoopbackAddress()).toString();
+ }
+}
\ No newline at end of file