opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/broker/impl/legacy/sharded/adapter/LegacyShardedDOMDataBrokerAdapter.java

   1 /*
   2  * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.controller.md.sal.dom.broker.impl.legacy.sharded.adapter;
  10
  11 import static com.google.common.base.Preconditions.checkNotNull;
  12
  13 import java.util.Collections;
  14 import java.util.Map;
  15 import java.util.concurrent.atomic.AtomicLong;
  16 import javax.annotation.Nonnull;
  17 import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
  18 import org.opendaylight.controller.md.sal.dom.api.DOMDataBroker;
  19 import org.opendaylight.controller.md.sal.dom.api.DOMDataBrokerExtension;
  20 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadOnlyTransaction;
  21 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadWriteTransaction;
  22 import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
  23 import org.opendaylight.controller.md.sal.dom.api.DOMTransactionChain;
  24 import org.opendaylight.mdsal.dom.api.DOMSchemaService;
  25 import org.opendaylight.mdsal.dom.broker.ShardedDOMDataBrokerAdapter;
  26
  27 /**
  28  * DOMDataBroker implementation that forwards calls to
  29  * {@link org.opendaylight.mdsal.dom.broker.ShardedDOMDataBrokerAdapter},
  30  * which in turn translates calls to shard aware implementation of
  31  * {@link org.opendaylight.mdsal.dom.api.DOMDataTreeService}
  32  *
  33  * <p>
  34  * The incompatibility between first and latter APIs, puts restriction on {@link DOMDataReadWriteTransaction}
  35  * and {@link DOMDataReadOnlyTransaction} provided by this data broker. See
  36  * {@link ShardedDOMDataBrokerDelegatingReadWriteTransaction}
  37  * and {@link ShardedDOMDataBrokerDelegatingReadTransaction} respectively.
  38  */
  39 // FIXME try to refactor some of the implementation to abstract class for better reusability
  40 public class LegacyShardedDOMDataBrokerAdapter implements DOMDataBroker {
  41
  42     private final org.opendaylight.mdsal.dom.api.DOMDataBroker delegateDataBroker;
  43     private final DOMSchemaService schemaService;
  44     private final AtomicLong txNum = new AtomicLong();
  45     private final AtomicLong chainNum = new AtomicLong();
  46
  47     public LegacyShardedDOMDataBrokerAdapter(final ShardedDOMDataBrokerAdapter delegateDataBroker,
  48                                              final DOMSchemaService schemaService) {
  49         this.delegateDataBroker = checkNotNull(delegateDataBroker);
  50         this.schemaService = checkNotNull(schemaService);
  51     }
  52
  53     @Override
  54     public DOMDataReadOnlyTransaction newReadOnlyTransaction() {
  55         return new ShardedDOMDataBrokerDelegatingReadTransaction(newTransactionIdentifier(),
  56                                                                  delegateDataBroker.newReadOnlyTransaction());
  57     }
  58
  59     @Override
  60     public DOMDataReadWriteTransaction newReadWriteTransaction() {
  61         return new ShardedDOMDataBrokerDelegatingReadWriteTransaction(newTransactionIdentifier(),
  62                                                                       schemaService.getGlobalContext(),
  63                                                                       newReadOnlyTransaction(),
  64                                                                       newWriteOnlyTransaction());
  65     }
  66
  67     @Override
  68     public DOMDataWriteTransaction newWriteOnlyTransaction() {
  69         return new ShardedDOMDataBrokerDelegatingWriteTransaction(newTransactionIdentifier(),
  70                                                                   delegateDataBroker.newWriteOnlyTransaction());
  71     }
  72
  73     @Override
  74     public DOMTransactionChain createTransactionChain(final TransactionChainListener listener) {
  75         return new ShardedDOMDataBrokerDelegatingTransactionChain(chainNum.getAndIncrement(),
  76                                                                   schemaService.getGlobalContext(), delegateDataBroker,
  77                                                                   listener);
  78     }
  79
  80     @Nonnull
  81     @Override
  82     public Map<Class<? extends DOMDataBrokerExtension>, DOMDataBrokerExtension> getSupportedExtensions() {
  83         return Collections.emptyMap();
  84     }
  85
  86     private Object newTransactionIdentifier() {
  87         return "DOM-" + txNum.getAndIncrement();
  88     }
  89 }