BUG-4118: Li:backward compatibility - rpcs - stats services
[openflowplugin.git] / openflowplugin-impl / src / main / java / org / opendaylight / openflowplugin / impl / statistics / services / OpendaylightFlowStatisticsServiceImpl.java
index 751da7ebfd3dba79784405fea59daa4b106bf069..cd127d6e16f68a03b3ba742049742e70c15a17e1 100644 (file)
@@ -8,32 +8,16 @@
 package org.opendaylight.openflowplugin.impl.statistics.services;
 
 import com.google.common.base.Function;
-import com.google.common.base.MoreObjects;
 import com.google.common.util.concurrent.Futures;
-import com.google.common.util.concurrent.JdkFutureAdapters;
-import com.google.common.util.concurrent.ListenableFuture;
-
-import java.io.Serializable;
-import java.math.BigInteger;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.Objects;
 import java.util.concurrent.Future;
-import org.opendaylight.openflowplugin.api.OFConstants;
 import org.opendaylight.openflowplugin.api.openflow.device.DeviceContext;
 import org.opendaylight.openflowplugin.api.openflow.device.MessageTranslator;
-import org.opendaylight.openflowplugin.api.openflow.device.RequestContext;
 import org.opendaylight.openflowplugin.api.openflow.device.RequestContextStack;
 import org.opendaylight.openflowplugin.api.openflow.device.TranslatorLibrary;
-import org.opendaylight.openflowplugin.api.openflow.device.Xid;
 import org.opendaylight.openflowplugin.api.openflow.md.core.TranslatorKey;
-import org.opendaylight.openflowplugin.impl.services.CommonService;
-import org.opendaylight.openflowplugin.impl.services.DataCrate;
-import org.opendaylight.openflowplugin.impl.services.OFJResult2RequestCtxFuture;
-import org.opendaylight.openflowplugin.impl.services.RequestInputUtils;
-import org.opendaylight.openflowplugin.openflow.md.core.sal.convertor.match.MatchReactor;
-import org.opendaylight.openflowplugin.openflow.md.util.FlowCreatorUtil;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.AggregateFlowStatisticsUpdate;
+import org.opendaylight.openflowplugin.api.openflow.statistics.compatibility.Delegator;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.GetAggregateFlowStatisticsFromFlowTableForAllFlowsInput;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.GetAggregateFlowStatisticsFromFlowTableForAllFlowsOutput;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.GetAggregateFlowStatisticsFromFlowTableForGivenMatchInput;
@@ -47,302 +31,127 @@ import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.G
 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.GetFlowStatisticsFromFlowTableOutput;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.OpendaylightFlowStatisticsService;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.statistics.rev130819.get.aggregate.flow.statistics.from.flow.table._for.given.match.output.AggregatedFlowStatistics;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.types.rev131026.FlowCookie;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.MultipartType;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.MultipartReply;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.MultipartRequestInputBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OfHeader;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketIn;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.PacketInMessage;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.multipart.reply.multipart.reply.body.MultipartReplyAggregateCase;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.multipart.request.multipart.request.body.MultipartRequestAggregateCaseBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.multipart.request.multipart.request.body.MultipartRequestFlowCaseBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.multipart.request.multipart.request.body.multipart.request.aggregate._case.MultipartRequestAggregateBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.multipart.request.multipart.request.body.multipart.request.flow._case.MultipartRequestFlowBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.packet.service.rev130709.PacketReceived;
-import org.opendaylight.yangtools.yang.common.RpcError;
 import org.opendaylight.yangtools.yang.common.RpcResult;
 import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import javax.annotation.Nullable;
-
 /**
  * @author joe
  */
-public class OpendaylightFlowStatisticsServiceImpl extends CommonService implements OpendaylightFlowStatisticsService {
+public class OpendaylightFlowStatisticsServiceImpl implements OpendaylightFlowStatisticsService, Delegator<OpendaylightFlowStatisticsService> {
 
     private static final Logger LOG = LoggerFactory.getLogger(OpendaylightFlowStatisticsServiceImpl.class);
 
-    public OpendaylightFlowStatisticsServiceImpl(final RequestContextStack requestContextStack, DeviceContext deviceContext) {
-        super(requestContextStack, deviceContext);
-    }
-
-    @Override
-    public Future<RpcResult<GetAggregateFlowStatisticsFromFlowTableForAllFlowsOutput>> getAggregateFlowStatisticsFromFlowTableForAllFlows(
-            final GetAggregateFlowStatisticsFromFlowTableForAllFlowsInput input) {
-
-
-        return this.<GetAggregateFlowStatisticsFromFlowTableForAllFlowsOutput, Void>handleServiceCall(
-                PRIMARY_CONNECTION,
-                new Function<DataCrate<GetAggregateFlowStatisticsFromFlowTableForAllFlowsOutput>, ListenableFuture<RpcResult<Void>>>() {
-
-                    @Override
-                    public ListenableFuture<RpcResult<Void>> apply(final DataCrate<GetAggregateFlowStatisticsFromFlowTableForAllFlowsOutput> data) {
+    private final Function<RpcResult<List<MultipartReply>>, RpcResult<GetAggregateFlowStatisticsFromFlowTableForGivenMatchOutput>> matchingConvertor =
+            new Function<RpcResult<List<MultipartReply>>, RpcResult<GetAggregateFlowStatisticsFromFlowTableForGivenMatchOutput>>() {
+                @Override
+                public RpcResult<GetAggregateFlowStatisticsFromFlowTableForGivenMatchOutput> apply(final RpcResult<List<MultipartReply>> input) {
+                    final DeviceContext deviceContext = matchingFlowsInTable.getDeviceContext();
+                    TranslatorLibrary translatorLibrary = deviceContext.oook();
+                    final RpcResult<GetAggregateFlowStatisticsFromFlowTableForGivenMatchOutput> rpcResult;
+                    if (input.isSuccessful()) {
+                        MultipartReply reply = input.getResult().get(0);
+                        final TranslatorKey translatorKey = new TranslatorKey(reply.getVersion(), MultipartReplyAggregateCase.class.getName());
+                        final MessageTranslator<MultipartReply, AggregatedFlowStatistics> messageTranslator = translatorLibrary.lookupTranslator(translatorKey);
+                        List<AggregatedFlowStatistics> aggregStats = new ArrayList<AggregatedFlowStatistics>();
+
+                        for (MultipartReply multipartReply : input.getResult()) {
+                            aggregStats.add(messageTranslator.translate(multipartReply, deviceContext, null));
+                        }
 
-                        // Create multipart request body for fetch all the group stats
-                        final MultipartRequestAggregateCaseBuilder multipartRequestAggregateCaseBuilder = new MultipartRequestAggregateCaseBuilder();
-                        final MultipartRequestAggregateBuilder mprAggregateRequestBuilder = new MultipartRequestAggregateBuilder();
-                        mprAggregateRequestBuilder.setTableId(input.getTableId().getValue());
-                        mprAggregateRequestBuilder.setOutPort(OFConstants.OFPP_ANY);
-                        mprAggregateRequestBuilder.setOutGroup(OFConstants.OFPG_ANY);
-                        mprAggregateRequestBuilder.setCookie(OFConstants.DEFAULT_COOKIE);
-                        mprAggregateRequestBuilder.setCookieMask(OFConstants.DEFAULT_COOKIE_MASK);
+                        GetAggregateFlowStatisticsFromFlowTableForGivenMatchOutputBuilder getAggregateFlowStatisticsFromFlowTableForGivenMatchOutputBuilder =
+                                new GetAggregateFlowStatisticsFromFlowTableForGivenMatchOutputBuilder();
+                        getAggregateFlowStatisticsFromFlowTableForGivenMatchOutputBuilder.setAggregatedFlowStatistics(aggregStats);
 
-                        FlowCreatorUtil.setWildcardedFlowMatch(version, mprAggregateRequestBuilder);
+                        rpcResult = RpcResultBuilder
+                                .<GetAggregateFlowStatisticsFromFlowTableForGivenMatchOutput>success()
+                                .withResult(getAggregateFlowStatisticsFromFlowTableForGivenMatchOutputBuilder.build())
+                                .build();
 
-                        // Set request body to main multipart request
-                        multipartRequestAggregateCaseBuilder.setMultipartRequestAggregate(mprAggregateRequestBuilder
-                                .build());
-                        final Xid xid = data.getRequestContext().getXid();
-                        final MultipartRequestInputBuilder mprInput = RequestInputUtils.createMultipartHeader(
-                                MultipartType.OFPMPAGGREGATE, xid.getValue(), version);
+                    } else {
+                        rpcResult = RpcResultBuilder
+                                .<GetAggregateFlowStatisticsFromFlowTableForGivenMatchOutput>failed()
+                                .withRpcErrors(input.getErrors())
+                                .build();
+                    }
+                    return rpcResult;
+                }
+    };
 
-                        mprInput.setMultipartRequestBody(multipartRequestAggregateCaseBuilder.build());
+    private final MatchingFlowsInTableService matchingFlowsInTable;
+    private OpendaylightFlowStatisticsService delegate;
 
-                        final Future<RpcResult<Void>> resultFromOFLib = deviceContext.getPrimaryConnectionContext()
-                                .getConnectionAdapter().multipartRequest(mprInput.build());
+    public OpendaylightFlowStatisticsServiceImpl(final RequestContextStack requestContextStack, final DeviceContext deviceContext) {
+        matchingFlowsInTable = new MatchingFlowsInTableService(requestContextStack, deviceContext);
+    }
 
-                        return JdkFutureAdapters.listenInPoolThread(resultFromOFLib);
-                    }
-                });
+    @Override
+    public void setDelegate(OpendaylightFlowStatisticsService delegate) {
+        this.delegate = delegate;
+    }
 
+    /**
+     * @deprecated provided for Be-release as backward compatibility relic
+     */
+    @Override
+    @Deprecated
+    public Future<RpcResult<GetAggregateFlowStatisticsFromFlowTableForAllFlowsOutput>> getAggregateFlowStatisticsFromFlowTableForAllFlows(
+            final GetAggregateFlowStatisticsFromFlowTableForAllFlowsInput input) {
+        if (delegate != null) {
+            return delegate.getAggregateFlowStatisticsFromFlowTableForAllFlows(input);
+        } else {
+            throw new IllegalAccessError("no delegate available - service is currently out of order");
+        }
     }
 
     @Override
     public Future<RpcResult<GetAggregateFlowStatisticsFromFlowTableForGivenMatchOutput>> getAggregateFlowStatisticsFromFlowTableForGivenMatch(
             final GetAggregateFlowStatisticsFromFlowTableForGivenMatchInput input) {
-
-
-        ListenableFuture<RpcResult<List<MultipartReply>>> rpcResultListenableFuture = handleServiceCall(
-            PRIMARY_CONNECTION,
-            new Function<DataCrate<List<MultipartReply>>, ListenableFuture<RpcResult<Void>>>() {
-
-                @Override
-                public ListenableFuture<RpcResult<Void>> apply(final DataCrate<List<MultipartReply>> data) {
-                    final Xid xid = data.getRequestContext().getXid();
-                    deviceContext.getOpenflowMessageListenerFacade().registerMultipartXid(xid.getValue());
-                    final MultipartRequestAggregateCaseBuilder multipartRequestAggregateCaseBuilder = new MultipartRequestAggregateCaseBuilder();
-                    final MultipartRequestAggregateBuilder mprAggregateRequestBuilder = new MultipartRequestAggregateBuilder();
-                    final short tableId = MoreObjects.firstNonNull(input.getTableId(), OFConstants.OFPTT_ALL).shortValue();
-                    mprAggregateRequestBuilder.setTableId(tableId);
-                    long outputPortValue = MoreObjects.firstNonNull(input.getOutPort(), OFConstants.OFPP_ANY).longValue();
-                    mprAggregateRequestBuilder.setOutPort(outputPortValue);
-                    // TODO: repeating code
-                    if (version == OFConstants.OFP_VERSION_1_3) {
-
-                        if (input.getCookie() == null) {
-                            mprAggregateRequestBuilder.setCookie(OFConstants.DEFAULT_COOKIE);
-                        } else {
-                            mprAggregateRequestBuilder.setCookie(MoreObjects.firstNonNull(input.getCookie().getValue(), OFConstants.DEFAULT_COOKIE));
-                        }
-
-                        if (input.getCookieMask() == null) {
-                            mprAggregateRequestBuilder.setCookieMask(OFConstants.DEFAULT_COOKIE_MASK);
-                        } else {
-                            mprAggregateRequestBuilder.setCookieMask(MoreObjects.firstNonNull(input.getCookieMask().getValue(), OFConstants.DEFAULT_COOKIE_MASK));
-                        }
-                        long outGroup = MoreObjects.firstNonNull(input.getOutGroup(), OFConstants.OFPG_ANY).longValue();
-                        mprAggregateRequestBuilder.setOutGroup(outGroup);
-                    } else {
-                        mprAggregateRequestBuilder.setOutGroup(OFConstants.OFPG_ANY);
-                        mprAggregateRequestBuilder.setCookie(OFConstants.DEFAULT_COOKIE);
-                        mprAggregateRequestBuilder.setCookieMask(OFConstants.DEFAULT_COOKIE_MASK);
-                    }
-
-                    MatchReactor.getInstance().convert(input.getMatch(), version, mprAggregateRequestBuilder,
-                            deviceContext.getPrimaryConnectionContext().getFeatures().getDatapathId());
-
-                    FlowCreatorUtil.setWildcardedFlowMatch(version, mprAggregateRequestBuilder);
-
-                    // Set request body to main multipart request
-                    multipartRequestAggregateCaseBuilder.setMultipartRequestAggregate(mprAggregateRequestBuilder
-                            .build());
-
-                    final MultipartRequestInputBuilder mprInput = RequestInputUtils.createMultipartHeader(
-                            MultipartType.OFPMPAGGREGATE, xid.getValue(), version);
-
-                    mprInput.setMultipartRequestBody(multipartRequestAggregateCaseBuilder.build());
-                    final Future<RpcResult<Void>> resultFromOFLib = deviceContext.getPrimaryConnectionContext()
-                            .getConnectionAdapter().multipartRequest(mprInput.build());
-                    return JdkFutureAdapters.listenInPoolThread(resultFromOFLib);
-                }
-            });
-
-        return Futures.transform(rpcResultListenableFuture, new Function<RpcResult<List<MultipartReply>>, RpcResult<GetAggregateFlowStatisticsFromFlowTableForGivenMatchOutput>>() {
-            @Nullable
-            @Override
-            public RpcResult<GetAggregateFlowStatisticsFromFlowTableForGivenMatchOutput> apply(RpcResult<List<MultipartReply>> input) {
-                TranslatorLibrary translatorLibrary = deviceContext.oook();
-                RpcResult<GetAggregateFlowStatisticsFromFlowTableForGivenMatchOutput> rpcResult;
-                if(input.isSuccessful()) {
-                    MultipartReply reply = input.getResult().get(0);
-                    final TranslatorKey translatorKey = new TranslatorKey(reply.getVersion(), MultipartReplyAggregateCase.class.getName());
-                    final MessageTranslator<MultipartReply, AggregatedFlowStatistics> messageTranslator = translatorLibrary.lookupTranslator(translatorKey);
-                    List<AggregatedFlowStatistics> aggregStats = new ArrayList<AggregatedFlowStatistics>();
-
-                    for (MultipartReply multipartReply : input.getResult()) {
-                        aggregStats.add(messageTranslator.translate(multipartReply, deviceContext, null));
-                    }
-
-                    GetAggregateFlowStatisticsFromFlowTableForGivenMatchOutputBuilder getAggregateFlowStatisticsFromFlowTableForGivenMatchOutputBuilder =
-                            new GetAggregateFlowStatisticsFromFlowTableForGivenMatchOutputBuilder();
-                    getAggregateFlowStatisticsFromFlowTableForGivenMatchOutputBuilder.setAggregatedFlowStatistics(aggregStats);
-
-                    rpcResult = RpcResultBuilder
-                            .<GetAggregateFlowStatisticsFromFlowTableForGivenMatchOutput>success()
-                            .withResult(getAggregateFlowStatisticsFromFlowTableForGivenMatchOutputBuilder.build())
-                            .build();
-
-                } else {
-                    rpcResult = RpcResultBuilder
-                            .<GetAggregateFlowStatisticsFromFlowTableForGivenMatchOutput>failed()
-                            .withRpcErrors(input.getErrors())
-                            .build();
-                }
-                return rpcResult;
-            }
-        });
-
+        return Futures.transform(matchingFlowsInTable.handleServiceCall(input), matchingConvertor);
     }
 
+    /**
+     * @deprecated provided for Be-release as backward compatibility relic
+     */
     @Override
+    @Deprecated
     public Future<RpcResult<GetAllFlowStatisticsFromFlowTableOutput>> getAllFlowStatisticsFromFlowTable(
             final GetAllFlowStatisticsFromFlowTableInput input) {
-
-        return this.<GetAllFlowStatisticsFromFlowTableOutput, Void>handleServiceCall(PRIMARY_CONNECTION,
-                new Function<DataCrate<GetAllFlowStatisticsFromFlowTableOutput>, ListenableFuture<RpcResult<Void>>>() {
-
-                    @Override
-                    public ListenableFuture<RpcResult<Void>> apply(final DataCrate<GetAllFlowStatisticsFromFlowTableOutput> data) {
-
-                        final MultipartRequestFlowBuilder mprFlowRequestBuilder = new MultipartRequestFlowBuilder();
-                        mprFlowRequestBuilder.setTableId(input.getTableId().getValue());
-                        mprFlowRequestBuilder.setOutPort(OFConstants.OFPP_ANY);
-                        mprFlowRequestBuilder.setOutGroup(OFConstants.OFPG_ANY);
-                        mprFlowRequestBuilder.setCookie(OFConstants.DEFAULT_COOKIE);
-                        mprFlowRequestBuilder.setCookieMask(OFConstants.DEFAULT_COOKIE_MASK);
-                        FlowCreatorUtil.setWildcardedFlowMatch(version, mprFlowRequestBuilder);
-
-                        final MultipartRequestFlowCaseBuilder multipartRequestFlowCaseBuilder = new MultipartRequestFlowCaseBuilder();
-                        multipartRequestFlowCaseBuilder.setMultipartRequestFlow(mprFlowRequestBuilder.build());
-
-                        final Xid xid = data.getRequestContext().getXid();
-                        final MultipartRequestInputBuilder mprInput = RequestInputUtils.createMultipartHeader(
-                                MultipartType.OFPMPFLOW, xid.getValue(), version);
-
-                        mprInput.setMultipartRequestBody(multipartRequestFlowCaseBuilder.build());
-                        final Future<RpcResult<Void>> resultFromOFLib = deviceContext.getPrimaryConnectionContext()
-                                .getConnectionAdapter().multipartRequest(mprInput.build());
-                        return JdkFutureAdapters.listenInPoolThread(resultFromOFLib);
-                    }
-                });
+        if (delegate != null) {
+            return delegate.getAllFlowStatisticsFromFlowTable(input);
+        } else {
+            throw new IllegalAccessError("no delegate available - service is currently out of order");
+        }
     }
 
+    /**
+     * @deprecated provided for Be-release as backward compatibility relic
+     */
     @Override
+    @Deprecated
     public Future<RpcResult<GetAllFlowsStatisticsFromAllFlowTablesOutput>> getAllFlowsStatisticsFromAllFlowTables(
             final GetAllFlowsStatisticsFromAllFlowTablesInput input) {
-
-
-        return this.<GetAllFlowsStatisticsFromAllFlowTablesOutput, Void>handleServiceCall(PRIMARY_CONNECTION,
-                new Function<DataCrate<GetAllFlowsStatisticsFromAllFlowTablesOutput>, ListenableFuture<RpcResult<Void>>>() {
-
-                    @Override
-                    public ListenableFuture<RpcResult<Void>> apply(final DataCrate<GetAllFlowsStatisticsFromAllFlowTablesOutput> data) {
-
-                        final MultipartRequestFlowCaseBuilder multipartRequestFlowCaseBuilder = new MultipartRequestFlowCaseBuilder();
-                        final MultipartRequestFlowBuilder mprFlowRequestBuilder = new MultipartRequestFlowBuilder();
-                        mprFlowRequestBuilder.setTableId(OFConstants.OFPTT_ALL);
-                        mprFlowRequestBuilder.setOutPort(OFConstants.OFPP_ANY);
-                        mprFlowRequestBuilder.setOutGroup(OFConstants.OFPG_ANY);
-                        mprFlowRequestBuilder.setCookie(OFConstants.DEFAULT_COOKIE);
-                        mprFlowRequestBuilder.setCookieMask(OFConstants.DEFAULT_COOKIE_MASK);
-                        FlowCreatorUtil.setWildcardedFlowMatch(version, mprFlowRequestBuilder);
-
-                        final Xid xid = data.getRequestContext().getXid();
-                        final MultipartRequestInputBuilder mprInput = RequestInputUtils.createMultipartHeader(
-                                MultipartType.OFPMPFLOW, xid.getValue(), version);
-
-                        multipartRequestFlowCaseBuilder.setMultipartRequestFlow(mprFlowRequestBuilder.build());
-                        mprInput.setMultipartRequestBody(multipartRequestFlowCaseBuilder.build());
-                        final Future<RpcResult<Void>> resultFromOFLib = deviceContext.getPrimaryConnectionContext()
-                                .getConnectionAdapter().multipartRequest(mprInput.build());
-                        return JdkFutureAdapters.listenInPoolThread(resultFromOFLib);
-                    }
-                });
+        if (delegate != null) {
+            return delegate.getAllFlowsStatisticsFromAllFlowTables(input);
+        } else {
+            throw new IllegalAccessError("no delegate available - service is currently out of order");
+        }
     }
 
+    /**
+     * @deprecated provided for Be-release as backward compatibility relic
+     */
     @Override
+    @Deprecated
     public Future<RpcResult<GetFlowStatisticsFromFlowTableOutput>> getFlowStatisticsFromFlowTable(
             final GetFlowStatisticsFromFlowTableInput input) {
-
-
-        return this.<GetFlowStatisticsFromFlowTableOutput, Void>handleServiceCall(PRIMARY_CONNECTION,
-                new Function<DataCrate<GetFlowStatisticsFromFlowTableOutput>, ListenableFuture<RpcResult<Void>>>() {
-
-                    @Override
-                    public ListenableFuture<RpcResult<Void>> apply(final DataCrate<GetFlowStatisticsFromFlowTableOutput> data) {
-
-                        final MultipartRequestFlowCaseBuilder multipartRequestFlowCaseBuilder = new MultipartRequestFlowCaseBuilder();
-                        final MultipartRequestFlowBuilder mprFlowRequestBuilder = new MultipartRequestFlowBuilder();
-                        mprFlowRequestBuilder.setTableId(input.getTableId());
-
-                        if (input.getOutPort() != null) {
-                            mprFlowRequestBuilder.setOutPort(input.getOutPort().longValue());
-                        } else {
-                            mprFlowRequestBuilder.setOutPort(OFConstants.OFPP_ANY);
-                        }
-
-                        if (input.getOutGroup() != null) {
-                            mprFlowRequestBuilder.setOutGroup(input.getOutGroup());
-                        } else {
-                            mprFlowRequestBuilder.setOutGroup(OFConstants.OFPG_ANY);
-                        }
-
-                        if (input.getCookie() != null) {
-                            mprFlowRequestBuilder.setCookie(input.getCookie().getValue());
-                        } else {
-                            mprFlowRequestBuilder.setCookie(OFConstants.DEFAULT_COOKIE);
-                        }
-
-                        if (input.getCookieMask() != null) {
-                            mprFlowRequestBuilder.setCookieMask(input.getCookieMask().getValue());
-                        } else {
-                            mprFlowRequestBuilder.setCookieMask(OFConstants.DEFAULT_COOKIE_MASK);
-                        }
-
-                        // convert and inject match
-                        MatchReactor.getInstance().convert(input.getMatch(), version, mprFlowRequestBuilder,
-                                deviceContext.getPrimaryConnectionContext().getFeatures().getDatapathId());
-
-                        // Set request body to main multipart request
-                        final Xid xid = data.getRequestContext().getXid();
-                        multipartRequestFlowCaseBuilder.setMultipartRequestFlow(mprFlowRequestBuilder.build());
-                        final MultipartRequestInputBuilder mprInput = RequestInputUtils.createMultipartHeader(
-                                MultipartType.OFPMPFLOW, xid.getValue(), version);
-                        mprInput.setMultipartRequestBody(multipartRequestFlowCaseBuilder.build());
-                        final Future<RpcResult<Void>> resultFromOFLib = deviceContext.getPrimaryConnectionContext()
-                                .getConnectionAdapter().multipartRequest(mprInput.build());
-                        return JdkFutureAdapters.listenInPoolThread(resultFromOFLib);
-                    }
-                });
-    }
-
-    private <T> void convertRpcResultToRequestFuture(final RequestContext<T> requestContext,
-                                                                        final ListenableFuture<RpcResult<Void>> futureResultFromOfLib) {
-        final OFJResult2RequestCtxFuture<T> OFJResult2RequestCtxFuture = new OFJResult2RequestCtxFuture<>(requestContext, deviceContext);
-        OFJResult2RequestCtxFuture.processResultFromOfJava(futureResultFromOfLib);
+        if (delegate != null) {
+            return delegate.getFlowStatisticsFromFlowTable(input);
+        } else {
+            throw new IllegalAccessError("no delegate available - service is currently out of order");
+        }
     }
-
 }