soften reaction of listeners on empty sxp-master-DB

[groupbasedpolicy.git] / sxp-mapper / src / main / java / org / opendaylight / groupbasedpolicy / sxp / mapper / impl / SxpMapperReactorImpl.java

diff --git a/sxp-mapper/src/main/java/org/opendaylight/groupbasedpolicy/sxp/mapper/impl/SxpMapperReactorImpl.java b/sxp-mapper/src/main/java/org/opendaylight/groupbasedpolicy/sxp/mapper/impl/SxpMapperReactorImpl.java
index 069dc0b75d3227ae0388079b12244e8264edf3ed..861c1aa5bd2eeac5c9734c97c066b0fc15328339 100644 (file)
--- a/sxp-mapper/src/main/java/org/opendaylight/groupbasedpolicy/sxp/mapper/impl/SxpMapperReactorImpl.java
+++ b/sxp-mapper/src/main/java/org/opendaylight/groupbasedpolicy/sxp/mapper/impl/SxpMapperReactorImpl.java
@@ -8,16 +8,119 @@
 
 package org.opendaylight.groupbasedpolicy.sxp.mapper.impl;
 
+import com.google.common.base.Optional;
+import com.google.common.base.Preconditions;
+import com.google.common.util.concurrent.AsyncFunction;
+import com.google.common.util.concurrent.CheckedFuture;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.JdkFutureAdapters;
+import com.google.common.util.concurrent.ListenableFuture;
+import java.util.Collections;
+import org.opendaylight.controller.md.sal.binding.api.DataBroker;
+import org.opendaylight.controller.md.sal.binding.api.ReadOnlyTransaction;
+import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
+import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
 import org.opendaylight.groupbasedpolicy.sxp.mapper.api.SxpMapperReactor;
+import org.opendaylight.groupbasedpolicy.sxp.mapper.impl.util.SxpListenerUtil;
+import org.opendaylight.groupbasedpolicy.util.IidFactory;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpAddress;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpPrefix;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Address;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.common.rev140421.L3ContextId;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.EndpointService;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.RegisterEndpointInput;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.RegisterEndpointInputBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoint.fields.L3Address;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoint.fields.L3AddressBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoints.EndpointL3;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.endpoint.rev140421.endpoints.EndpointL3Key;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.config.groupbasedpolicy.sxp.mapper.model.rev160302.sxp.mapper.EndpointForwardingTemplateBySubnet;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.config.groupbasedpolicy.sxp.mapper.model.rev160302.sxp.mapper.EndpointPolicyTemplateBySgt;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.sxp.database.rev160308.master.database.fields.MasterDatabaseBinding;
+import org.opendaylight.yangtools.yang.common.RpcResult;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Purpose: exclusively processes sxp master database changes and EGP templates changes
  */
 public class SxpMapperReactorImpl implements SxpMapperReactor {
+
+    private static final Logger LOG = LoggerFactory.getLogger(SxpMapperReactorImpl.class);
+
     private final EndpointService l3EndpointService;
+    private final DataBroker dataBroker;
+
+    public SxpMapperReactorImpl(final EndpointService l3EndpointService, final DataBroker dataBroker) {
+        this.l3EndpointService = Preconditions.checkNotNull(l3EndpointService, "l3Endpoint service missing");
+        this.dataBroker = Preconditions.checkNotNull(dataBroker, "dataBroker missing");
+    }
+
+    @Override
+    public ListenableFuture<RpcResult<Void>> processPolicyAndSxpMasterDB(final EndpointPolicyTemplateBySgt template, final MasterDatabaseBinding masterDBBinding) {
+        LOG.debug("processing ep-policy-template + sxpMasterDB entry: {} - {}",
+                masterDBBinding.getSecurityGroupTag(), masterDBBinding.getIpPrefix());
+        // apply sxpMasterDB to policy template
+        final L3Address l3Address = buildL3Address(masterDBBinding.getIpPrefix());
+        final RegisterEndpointInput epInput = new RegisterEndpointInputBuilder()
+                .setCondition(template.getConditions())
+                .setTenant(template.getTenant())
+                .setEndpointGroups(template.getEndpointGroups())
+                .setL3Address(Collections.singletonList(l3Address))
+                .build();
+
+        return chainL3EPServiceIfEpAbsent(l3Address, epInput);
+    }
+
+    @Override
+    public ListenableFuture<RpcResult<Void>> processForwardingAndSxpMasterDB(final EndpointForwardingTemplateBySubnet template, final MasterDatabaseBinding masterDBBinding) {
+        LOG.debug("processing ep-forwarding-template + sxpMasterDB entry: {} - {}",
+                masterDBBinding.getSecurityGroupTag(), masterDBBinding.getIpPrefix());
+        // apply sxpMasterDB to policy template
+        final L3Address l3Address = buildL3Address(masterDBBinding.getIpPrefix());
+        final RegisterEndpointInput epInput = new RegisterEndpointInputBuilder()
+                .setNetworkContainment(template.getNetworkContainment())
+                .setL3Address(Collections.singletonList(l3Address))
+                .build();
 
-    public SxpMapperReactorImpl(final EndpointService l3EndpointService) {
-        this.l3EndpointService = l3EndpointService;
+        return chainL3EPServiceIfEpAbsent(l3Address, epInput);
+    }
+
+    private L3Address buildL3Address(final IpPrefix ipPrefix) {
+        final String ipv4PrefixValue = ipPrefix.getIpv4Prefix().getValue();
+        final IpAddress ipv4Value = new IpAddress(new Ipv4Address(ipv4PrefixValue.replaceFirst("/.+", "")));
+        return new L3AddressBuilder()
+                .setIpAddress(ipv4Value)
+                .setL3Context(new L3ContextId(ipv4PrefixValue))
+                .build();
+    }
+
+    private CheckedFuture<Optional<EndpointL3>, ReadFailedException> findExistingEndPoint(final L3Address l3Address) {
+        EndpointL3Key epL3key = new EndpointL3Key(l3Address.getIpAddress(), l3Address.getL3Context());
+        final ReadOnlyTransaction rTx = dataBroker.newReadOnlyTransaction();
+        final CheckedFuture<Optional<EndpointL3>, ReadFailedException> read = rTx.read(
+                LogicalDatastoreType.OPERATIONAL, IidFactory.l3EndpointIid(epL3key));
+        Futures.addCallback(read, SxpListenerUtil.createTxCloseCallback(rTx));
+        return read;
+    }
+
+    private ListenableFuture<RpcResult<Void>> chainL3EPServiceIfEpAbsent(final L3Address l3Address, final RegisterEndpointInput epInput) {
+        CheckedFuture<Optional<EndpointL3>, ReadFailedException> existingEndpointFuture = findExistingEndPoint(l3Address);
+
+        return Futures.transform(existingEndpointFuture, new AsyncFunction<Optional<EndpointL3>, RpcResult<Void>>() {
+            @Override
+            public ListenableFuture<RpcResult<Void>> apply(final Optional<EndpointL3> input) throws Exception {
+                final ListenableFuture<RpcResult<Void>> nextResult;
+                if (input == null || !input.isPresent()) {
+                    // invoke service
+                    return JdkFutureAdapters.listenInPoolThread(l3EndpointService.registerEndpoint(epInput));
+                } else {
+                    final String existingL3EpMsg = String.format("L3Endpoint for given key already exists: %s", l3Address);
+                    nextResult = Futures.immediateFailedFuture(new IllegalStateException(existingL3EpMsg));
+                }
+                return nextResult;
+            }
+        });
     }
 }
+