Jonathan Hart | 6df9017 | 2014-04-03 10:13:11 -0700 | [diff] [blame] | 1 | package net.onrc.onos.core.datastore; |
Yuta HIGUCHI | 66ca1bf | 2014-03-12 18:34:09 -0700 | [diff] [blame] | 2 | |
| 3 | import java.util.Collection; |
| 4 | import java.util.List; |
| 5 | |
Jonathan Hart | 6df9017 | 2014-04-03 10:13:11 -0700 | [diff] [blame] | 6 | import net.onrc.onos.core.datastore.IKVTable.IKVEntry; |
Yuta HIGUCHI | 66ca1bf | 2014-03-12 18:34:09 -0700 | [diff] [blame] | 7 | |
| 8 | /** |
| 9 | * Interface for a client class used to access the Key-Value store |
| 10 | */ |
| 11 | public interface IKVClient { |
| 12 | |
| 13 | public IKVTable getTable(final String tableName); |
| 14 | |
| 15 | /** |
| 16 | * Drop table. |
| 17 | * |
| 18 | * Behavior of IKVTable instances accessing dropped table is undefined. |
| 19 | * |
| 20 | * @param table IKVTable to drop. |
| 21 | */ |
| 22 | public void dropTable(IKVTable table); |
| 23 | |
| 24 | /** |
| 25 | * Create a Key-Value entry on table. |
| 26 | * |
| 27 | * @param tableId |
| 28 | * @param key |
| 29 | * @param value |
| 30 | * @return version of the created entry |
| 31 | * @throws ObjectExistsException |
| 32 | */ |
| 33 | public long create(IKVTableID tableId, byte[] key, byte[] value) throws ObjectExistsException; |
| 34 | |
| 35 | /** |
| 36 | * Create a Key-Value entry on table, without existence checking. |
| 37 | * |
| 38 | * @param tableId |
| 39 | * @param key |
| 40 | * @param value |
| 41 | * @return version of the created entry |
| 42 | */ |
| 43 | public long forceCreate(IKVTableID tableId, byte[] key, byte[] value); |
| 44 | |
| 45 | /** |
| 46 | * Read a Key-Value entry from table. |
| 47 | * |
| 48 | * @param tableId |
| 49 | * @param key |
| 50 | * @return Corresponding {@link IKVEntry} |
| 51 | * @throws ObjectDoesntExistException |
| 52 | */ |
| 53 | public IKVEntry read(IKVTableID tableId, byte[] key) throws ObjectDoesntExistException; |
| 54 | |
| 55 | /** |
| 56 | * Update an existing Key-Value entry in table. |
| 57 | * |
| 58 | * @param tableId |
| 59 | * @param key |
| 60 | * @param value |
| 61 | * @param version |
| 62 | * expected version in the data store |
| 63 | * @return version after update |
| 64 | * @throws ObjectDoesntExistException |
| 65 | * @throws WrongVersionException |
| 66 | */ |
| 67 | public long update(IKVTableID tableId, byte[] key, byte[] value, long version) |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 68 | throws ObjectDoesntExistException, WrongVersionException; |
Yuta HIGUCHI | 66ca1bf | 2014-03-12 18:34:09 -0700 | [diff] [blame] | 69 | |
| 70 | /** |
| 71 | * Update an existing Key-Value entry in table, without checking version. |
| 72 | * |
| 73 | * FIXME remove this method and use forceCreate for this purpose? |
| 74 | * @param tableId |
| 75 | * @param key |
| 76 | * @param value |
| 77 | * @return version after update |
| 78 | * @throws ObjectDoesntExistException |
| 79 | */ |
| 80 | @Deprecated |
| 81 | public long update(IKVTableID tableId, byte[] key, byte[] value) |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 82 | throws ObjectDoesntExistException; |
Yuta HIGUCHI | 66ca1bf | 2014-03-12 18:34:09 -0700 | [diff] [blame] | 83 | |
| 84 | // TODO Adding serialized value as parameter to this interface may |
| 85 | // give an option to improve performance on some backends. |
| 86 | /** |
| 87 | * Remove an existing Key-Value entry in table |
| 88 | * |
| 89 | * @param tableId |
| 90 | * @param key |
| 91 | * @param version |
| 92 | * expected version in the data store |
| 93 | * @return version of removed object |
| 94 | * @throws ObjectDoesntExistException |
| 95 | * @throws WrongVersionException |
| 96 | */ |
| 97 | public long delete(IKVTableID tableId, byte[] key, long version) |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 98 | throws ObjectDoesntExistException, WrongVersionException; |
Yuta HIGUCHI | 66ca1bf | 2014-03-12 18:34:09 -0700 | [diff] [blame] | 99 | |
| 100 | /** |
| 101 | * Remove a Key-Value entry in table |
| 102 | * |
| 103 | * @param tableId |
| 104 | * @param key |
| 105 | * @return version of removed object or -1, if it did not exist. |
| 106 | */ |
| 107 | public long forceDelete(IKVTableID tableId, byte[] key); |
| 108 | |
| 109 | /** |
| 110 | * Get all the entries in table. |
| 111 | * @param tableId |
| 112 | * @return entries in this table. |
| 113 | */ |
| 114 | public Iterable<IKVEntry> getAllEntries(IKVTableID tableId); |
| 115 | |
| 116 | /** |
| 117 | * |
| 118 | * @see #create(IKVTableID, byte[], byte[]) |
| 119 | * |
| 120 | * @return IMultiOpEntry for this operation |
| 121 | * |
| 122 | */ |
| 123 | public IMultiEntryOperation createOp(IKVTableID tableId, byte[] key, byte[] value); |
| 124 | |
| 125 | public IMultiEntryOperation forceCreateOp(IKVTableID tableId, byte[] key, |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 126 | byte[] value); |
Yuta HIGUCHI | 66ca1bf | 2014-03-12 18:34:09 -0700 | [diff] [blame] | 127 | |
| 128 | public IMultiEntryOperation readOp(IKVTableID tableId, byte[] key); |
| 129 | |
| 130 | public IMultiEntryOperation updateOp(IKVTableID tableId, byte[] key, byte[] value, |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 131 | long version); |
Yuta HIGUCHI | 66ca1bf | 2014-03-12 18:34:09 -0700 | [diff] [blame] | 132 | |
| 133 | public IMultiEntryOperation deleteOp(IKVTableID tableId, byte[] key, byte[] value, |
Yuta HIGUCHI | 826b4a4 | 2014-03-24 13:10:33 -0700 | [diff] [blame] | 134 | long version); |
Yuta HIGUCHI | 66ca1bf | 2014-03-12 18:34:09 -0700 | [diff] [blame] | 135 | |
| 136 | public IMultiEntryOperation forceDeleteOp(IKVTableID tableId, byte[] key); |
| 137 | |
| 138 | /** |
| 139 | * Batch delete operation |
| 140 | * @param ops delete operations |
| 141 | * @return true if failed operation exists |
| 142 | */ |
| 143 | public boolean multiDelete(final Collection<IMultiEntryOperation> ops); |
| 144 | |
| 145 | /** |
| 146 | * Batch write operation |
| 147 | * @param ops write operations |
| 148 | * @return true if failed operation exists |
| 149 | */ |
| 150 | public boolean multiWrite(final List<IMultiEntryOperation> ops); |
| 151 | |
| 152 | /** |
| 153 | * Batch read operation |
| 154 | * @param ops read operations |
| 155 | * @return true if failed operation exists |
| 156 | */ |
| 157 | public boolean multiRead(final Collection<IMultiEntryOperation> ops); |
| 158 | |
| 159 | /** |
| 160 | * Version number which represents that the object does not exist, or has |
| 161 | * never been read the DB before. |
| 162 | */ |
| 163 | public long VERSION_NONEXISTENT(); |
| 164 | |
| 165 | } |