api: Display hypervisor type for VM snapshot (#4275)

The "hypervisor" field in listvmsnapshot response will
be used in primate to enable/disable creating snapshot
from vm snapshot functionality.

Creating snpashot from vm snapshot will be enabled only if
hypervisor is KVM

Author: ravening

api/src/main/java/org/apache/cloudstack/api/response/VMSnapshotResponse.java

@@ -21,6 +21,7 @@
 import java.util.LinkedHashSet;
 import java.util.Set;
 
+import com.cloud.hypervisor.Hypervisor;
 import org.apache.cloudstack.api.ApiConstants;
 import org.apache.cloudstack.api.BaseResponseWithTagInformation;
 import org.apache.cloudstack.api.EntityReference;
@@ -100,6 +101,10 @@ public class VMSnapshotResponse extends BaseResponseWithTagInformation implement
     @Param(description = "the domain associated with the disk volume")
     private String domainName;
 
+    @SerializedName(ApiConstants.HYPERVISOR)
+    @Param(description = "the type of hypervisor on which snapshot is stored")
+    private Hypervisor.HypervisorType hypervisor;
+
     public VMSnapshotResponse() {
         tags = new LinkedHashSet<ResourceTagResponse>();
     }
@@ -236,4 +241,12 @@ public void setDomainName(String domainName) {
     public void setTags(Set<ResourceTagResponse> tags) {
         this.tags = tags;
     }
+
+    public Hypervisor.HypervisorType getHypervisor() {
+        return hypervisor;
+    }
+
+    public void setHypervisor(Hypervisor.HypervisorType hypervisor) {
+        this.hypervisor = hypervisor;
+    }
 }

server/src/main/java/com/cloud/api/ApiResponseHelper.java

@@ -620,6 +620,7 @@ public VMSnapshotResponse createVMSnapshotResponse(VMSnapshot vmSnapshot) {
         UserVm vm = ApiDBUtils.findUserVmById(vmSnapshot.getVmId());
         if (vm != null) {
             vmSnapshotResponse.setVirtualMachineid(vm.getUuid());
+            vmSnapshotResponse.setHypervisor(vm.getHypervisorType());
             DataCenterVO datacenter = ApiDBUtils.findZoneById(vm.getDataCenterId());
             if (datacenter != null) {
                 vmSnapshotResponse.setZoneId(datacenter.getUuid());