*/
package org.opendaylight.openflowplugin.impl.services;
+import com.google.common.base.Preconditions;
+import com.google.common.util.concurrent.AsyncFunction;
+import com.google.common.util.concurrent.FutureCallback;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.JdkFutureAdapters;
+import com.google.common.util.concurrent.ListenableFuture;
+import com.google.common.util.concurrent.SettableFuture;
+import java.math.BigInteger;
import java.util.concurrent.Future;
+import java.util.concurrent.Semaphore;
+import javax.annotation.concurrent.GuardedBy;
+import org.opendaylight.openflowplugin.api.openflow.connection.ConnectionContext.CONNECTION_STATE;
import org.opendaylight.openflowplugin.api.openflow.device.DeviceContext;
import org.opendaylight.openflowplugin.api.openflow.device.RequestContextStack;
import org.opendaylight.openflowplugin.api.openflow.device.Xid;
+import org.opendaylight.openflowplugin.impl.role.RoleChangeException;
import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OfHeader;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.RoleRequestOutput;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.OfpRole;
import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.SalRoleService;
import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.SetRoleInput;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.SetRoleInputBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.role.service.rev150727.SetRoleOutput;
import org.opendaylight.yangtools.yang.common.RpcResult;
+import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
-public class SalRoleServiceImpl extends AbstractSimpleService<SetRoleInputBuilder, SetRoleOutput> implements SalRoleService {
+public final class SalRoleServiceImpl extends AbstractSimpleService<SetRoleInput, SetRoleOutput> implements SalRoleService {
+
+ private static final Logger LOG = LoggerFactory.getLogger(SalRoleServiceImpl.class);
+
+ private static final BigInteger MAX_GENERATION_ID = new BigInteger("ffffffffffffffff", 16);
+
+ private static final int MAX_RETRIES = 42;
+
+ private final DeviceContext deviceContext;
+ private final RoleService roleService;
+
+ private final Semaphore currentRoleGuard = new Semaphore(1, true);
+
+ @GuardedBy("currentRoleGuard")
+ private OfpRole currentRole = OfpRole.NOCHANGE;
public SalRoleServiceImpl(final RequestContextStack requestContextStack, final DeviceContext deviceContext) {
super(requestContextStack, deviceContext, SetRoleOutput.class);
+ this.deviceContext = Preconditions.checkNotNull(deviceContext);
+ this.roleService = new RoleService(requestContextStack, deviceContext, RoleRequestOutput.class);
}
@Override
- protected OfHeader buildRequest(Xid xid, SetRoleInputBuilder input) {
+ protected OfHeader buildRequest(final Xid xid, final SetRoleInput input) throws ServiceException {
return null;
}
@Override
- public Future<RpcResult<SetRoleOutput>> setRole(SetRoleInput input) {
- return null;
+ public Future<RpcResult<SetRoleOutput>> setRole(final SetRoleInput input) {
+ LOG.info("SetRole called with input:{}", input);
+ try {
+ currentRoleGuard.acquire();
+ LOG.trace("currentRole lock queue length: {} " + currentRoleGuard.getQueueLength());
+ } catch (final InterruptedException e) {
+ LOG.error("Unexpected exception {} for acquire semaphore for input {}", e, input);
+ return RpcResultBuilder.<SetRoleOutput> failed().buildFuture();
+ }
+ // compare with last known role and set if different. If they are same, then return.
+ if (currentRole.equals(input.getControllerRole())) {
+ LOG.info("Role to be set is same as the last known role for the device:{}. Hence ignoring.",
+ input.getControllerRole());
+ currentRoleGuard.release();
+ return RpcResultBuilder.<SetRoleOutput> success().buildFuture();
+ }
+
+ final SettableFuture<RpcResult<SetRoleOutput>> resultFuture = SettableFuture.<RpcResult<SetRoleOutput>> create();
+ repeaterForChangeRole(resultFuture, input, 0);
+ /* Add Callback for release Guard */
+ Futures.addCallback(resultFuture, new FutureCallback<RpcResult<SetRoleOutput>>() {
+
+ @Override
+ public void onSuccess(final RpcResult<SetRoleOutput> result) {
+ LOG.debug("SetRoleService for Node: {} is ok Role: {}", input.getNode().getValue(),
+ input.getControllerRole());
+ currentRoleGuard.release();
+ }
+
+ @Override
+ public void onFailure(final Throwable t) {
+ LOG.error("SetRoleService set Role {} for Node: {} fail . Reason {}", input.getControllerRole(),
+ input.getNode().getValue(), t);
+ currentRoleGuard.release();
+ }
+ });
+ return resultFuture;
+ }
+
+ private void repeaterForChangeRole(final SettableFuture<RpcResult<SetRoleOutput>> future, final SetRoleInput input,
+ final int retryCounter) {
+ if (future.isCancelled()) {
+ future.setException(new RoleChangeException(String.format(
+ "Set Role for device %s stop because Future was canceled", input.getNode().getValue())));
+ return;
+ }
+ if (retryCounter >= MAX_RETRIES) {
+ future.setException(new RoleChangeException(String.format("Set Role failed after %s tries on device %s",
+ MAX_RETRIES, input.getNode().getValue())));
+ return;
+ }
+ // Check current connection state
+ final CONNECTION_STATE state = deviceContext.getPrimaryConnectionContext().getConnectionState();
+ switch (state) {
+ case RIP:
+ LOG.info("Device {} has been disconnected", input.getNode());
+ future.setException(new Exception(String.format(
+ "Device connection doesn't exist anymore. Primary connection status : %s", state)));
+ return;
+ case WORKING:
+ // We can proceed
+ LOG.trace("Device {} has been working", input.getNode());
+ break;
+ default:
+ LOG.warn("Device {} is in state {}, role change is not allowed", input.getNode(), state);
+ future.setException(new Exception(String.format("Unexcpected device connection status : %s", state)));
+ return;
+ }
+
+ LOG.info("Requesting state change to {}", input.getControllerRole());
+ final ListenableFuture<RpcResult<SetRoleOutput>> changeRoleFuture = tryToChangeRole(input.getControllerRole());
+ Futures.addCallback(changeRoleFuture, new FutureCallback<RpcResult<SetRoleOutput>>() {
+
+ @Override
+ public void onSuccess(final RpcResult<SetRoleOutput> result) {
+ if (result.isSuccessful()) {
+ LOG.debug("setRoleOutput received after roleChangeTask execution:{}", result);
+ currentRole = input.getControllerRole();
+ future.set(RpcResultBuilder.<SetRoleOutput> success().withResult(result.getResult()).build());
+ } else {
+ LOG.error("setRole() failed with errors, will retry: {} times.", MAX_RETRIES - retryCounter);
+ repeaterForChangeRole(future, input, (retryCounter + 1));
+ }
+ }
+
+ @Override
+ public void onFailure(final Throwable t) {
+ LOG.error("Exception in setRole(), will retry: {} times.", t, MAX_RETRIES - retryCounter);
+ repeaterForChangeRole(future, input, (retryCounter + 1));
+ }
+ });
+ }
+
+ private ListenableFuture<RpcResult<SetRoleOutput>> tryToChangeRole(final OfpRole role) {
+ LOG.info("RoleChangeTask called on device:{} OFPRole:{}", getDeviceInfo().getNodeId().getValue(), role);
+
+ final Future<BigInteger> generationFuture = roleService.getGenerationIdFromDevice(getVersion());
+
+ return Futures.transform(JdkFutureAdapters.listenInPoolThread(generationFuture), (AsyncFunction<BigInteger, RpcResult<SetRoleOutput>>) generationId -> {
+ LOG.debug("RoleChangeTask, GenerationIdFromDevice from device {} is {}", getDeviceInfo().getNodeId().getValue(), generationId);
+ final BigInteger nextGenerationId = getNextGenerationId(generationId);
+ LOG.debug("nextGenerationId received from device:{} is {}", getDeviceInfo().getNodeId().getValue(), nextGenerationId);
+ final Future<RpcResult<SetRoleOutput>> submitRoleFuture = roleService.submitRoleChange(role, getVersion(), nextGenerationId);
+ return JdkFutureAdapters.listenInPoolThread(submitRoleFuture);
+ });
+ }
+
+ private static BigInteger getNextGenerationId(final BigInteger generationId) {
+ if (generationId.compareTo(MAX_GENERATION_ID) < 0) {
+ return generationId.add(BigInteger.ONE);
+ } else {
+ return BigInteger.ZERO;
+ }
}
}
Code Review / openflowplugin.git / blobdiff