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