Work toward ONOS-1451: Separate Event Key space per instance
Misc changes and cleanup (Step 2):
* Added OnosInstanceId field to class TopologyEvent. For now it is
just assigned, but is not used.
* Minor refactoring of class TopologyEvent so it will be easier to make it
immutable after its its internals and usage are inalized.
* Modified the signature of method PathIntentMap.getIntentsByLink()
to use LinkTuple for the lookup instead of LinkEvent.
* Replaced (only inside onos/core/topology) the usage of Apache's
Validate with Google's Preconditions for null-checking and assignment.
With Apache's Validate we have to use two statements:
Validate.notNull(foo);
this.foo = foo;
With Google's Preconditions we can do it with a single statement:
this.foo = checkNotNull(foo);
NOTE: Apache's commons-lang version 3.x adds Google's semantics.
In the future, we need to decide (across all ONOS code) whether
to use Google's Preconditions or Apache's Validate 3.x
* Removed one of the LinkEvent convenience constructors, because it is used
only in 1-2 places in the unit tests, and nowhere in the main code.
* Few other (minor) cleanup changes
Change-Id: I05dae593ae1244a0af23515e7c73911f21275479
diff --git a/src/main/java/net/onrc/onos/core/topology/HostEvent.java b/src/main/java/net/onrc/onos/core/topology/HostEvent.java
index ebaf688..1c64939 100644
--- a/src/main/java/net/onrc/onos/core/topology/HostEvent.java
+++ b/src/main/java/net/onrc/onos/core/topology/HostEvent.java
@@ -11,6 +11,7 @@
import net.onrc.onos.core.topology.web.serializers.HostEventSerializer;
import net.onrc.onos.core.util.SwitchPort;
+import static com.google.common.base.Preconditions.checkNotNull;
import org.codehaus.jackson.map.annotate.JsonSerialize;
/**
@@ -42,11 +43,13 @@
mac = null;
}
+ /**
+ * Creates the Host object.
+ *
+ * @param mac the MAC address to identify the host
+ */
public HostEvent(MACAddress mac) {
- if (mac == null) {
- throw new IllegalArgumentException("Host mac cannot be null");
- }
- this.mac = mac;
+ this.mac = checkNotNull(mac);
this.attachmentPoints = new LinkedList<>();
}