Madan Jampani | 94c2353 | 2015-02-05 17:40:01 -0800 | [diff] [blame^] | 1 | package org.onosproject.store.consistent.impl; |
| 2 | |
| 3 | import net.kuujo.copycat.resource.internal.ResourceContext; |
| 4 | import net.kuujo.copycat.state.StateMachine; |
| 5 | import net.kuujo.copycat.resource.internal.AbstractResource; |
| 6 | import net.kuujo.copycat.state.internal.DefaultStateMachine; |
| 7 | import net.kuujo.copycat.util.concurrent.Futures; |
| 8 | |
| 9 | import java.util.Collection; |
| 10 | import java.util.List; |
| 11 | import java.util.Map; |
| 12 | import java.util.Set; |
| 13 | import java.util.concurrent.CompletableFuture; |
| 14 | import java.util.function.Supplier; |
| 15 | |
| 16 | /** |
| 17 | * Default database. |
| 18 | */ |
| 19 | public class DefaultDatabase extends AbstractResource<Database> implements Database { |
| 20 | private final StateMachine<DatabaseState<String, byte[]>> stateMachine; |
| 21 | private DatabaseProxy<String, byte[]> proxy; |
| 22 | |
| 23 | @SuppressWarnings("unchecked") |
| 24 | public DefaultDatabase(ResourceContext context) { |
| 25 | super(context); |
| 26 | this.stateMachine = new DefaultStateMachine(context, DatabaseState.class, DefaultDatabaseState.class); |
| 27 | } |
| 28 | |
| 29 | /** |
| 30 | * If the database is closed, returning a failed CompletableFuture. Otherwise, calls the given supplier to |
| 31 | * return the completed future result. |
| 32 | * |
| 33 | * @param supplier The supplier to call if the database is open. |
| 34 | * @param <T> The future result type. |
| 35 | * @return A completable future that if this database is closed is immediately failed. |
| 36 | */ |
| 37 | protected <T> CompletableFuture<T> checkOpen(Supplier<CompletableFuture<T>> supplier) { |
| 38 | if (proxy == null) { |
| 39 | return Futures.exceptionalFuture(new IllegalStateException("Database closed")); |
| 40 | } |
| 41 | return supplier.get(); |
| 42 | } |
| 43 | |
| 44 | @Override |
| 45 | public CompletableFuture<Integer> size(String tableName) { |
| 46 | return checkOpen(() -> proxy.size(tableName)); |
| 47 | } |
| 48 | |
| 49 | @Override |
| 50 | public CompletableFuture<Boolean> isEmpty(String tableName) { |
| 51 | return checkOpen(() -> proxy.isEmpty(tableName)); |
| 52 | } |
| 53 | |
| 54 | @Override |
| 55 | public CompletableFuture<Boolean> containsKey(String tableName, String key) { |
| 56 | return checkOpen(() -> proxy.containsKey(tableName, key)); |
| 57 | } |
| 58 | |
| 59 | @Override |
| 60 | public CompletableFuture<Boolean> containsValue(String tableName, byte[] value) { |
| 61 | return checkOpen(() -> proxy.containsValue(tableName, value)); |
| 62 | } |
| 63 | |
| 64 | @Override |
| 65 | public CompletableFuture<Versioned<byte[]>> get(String tableName, String key) { |
| 66 | return checkOpen(() -> proxy.get(tableName, key)); |
| 67 | } |
| 68 | |
| 69 | @Override |
| 70 | public CompletableFuture<Versioned<byte[]>> put(String tableName, String key, byte[] value) { |
| 71 | return checkOpen(() -> proxy.put(tableName, key, value)); |
| 72 | } |
| 73 | |
| 74 | @Override |
| 75 | public CompletableFuture<Versioned<byte[]>> remove(String tableName, String key) { |
| 76 | return checkOpen(() -> proxy.remove(tableName, key)); |
| 77 | } |
| 78 | |
| 79 | @Override |
| 80 | public CompletableFuture<Void> clear(String tableName) { |
| 81 | return checkOpen(() -> proxy.clear(tableName)); |
| 82 | } |
| 83 | |
| 84 | @Override |
| 85 | public CompletableFuture<Set<String>> keySet(String tableName) { |
| 86 | return checkOpen(() -> proxy.keySet(tableName)); |
| 87 | } |
| 88 | |
| 89 | @Override |
| 90 | public CompletableFuture<Collection<Versioned<byte[]>>> values(String tableName) { |
| 91 | return checkOpen(() -> proxy.values(tableName)); |
| 92 | } |
| 93 | |
| 94 | @Override |
| 95 | public CompletableFuture<Set<Map.Entry<String, Versioned<byte[]>>>> entrySet(String tableName) { |
| 96 | return checkOpen(() -> proxy.entrySet(tableName)); |
| 97 | } |
| 98 | |
| 99 | @Override |
| 100 | public CompletableFuture<Versioned<byte[]>> putIfAbsent(String tableName, String key, byte[] value) { |
| 101 | return checkOpen(() -> proxy.putIfAbsent(tableName, key, value)); |
| 102 | } |
| 103 | |
| 104 | @Override |
| 105 | public CompletableFuture<Boolean> remove(String tableName, String key, byte[] value) { |
| 106 | return checkOpen(() -> proxy.remove(tableName, key, value)); |
| 107 | } |
| 108 | |
| 109 | @Override |
| 110 | public CompletableFuture<Boolean> remove(String tableName, String key, long version) { |
| 111 | return checkOpen(() -> proxy.remove(tableName, key, version)); |
| 112 | } |
| 113 | |
| 114 | @Override |
| 115 | public CompletableFuture<Boolean> replace(String tableName, String key, byte[] oldValue, byte[] newValue) { |
| 116 | return checkOpen(() -> proxy.replace(tableName, key, oldValue, newValue)); |
| 117 | } |
| 118 | |
| 119 | @Override |
| 120 | public CompletableFuture<Boolean> replace(String tableName, String key, long oldVersion, byte[] newValue) { |
| 121 | return checkOpen(() -> proxy.replace(tableName, key, oldVersion, newValue)); |
| 122 | } |
| 123 | |
| 124 | @Override |
| 125 | public CompletableFuture<Boolean> atomicBatchUpdate(List<UpdateOperation<String, byte[]>> updates) { |
| 126 | return checkOpen(() -> proxy.atomicBatchUpdate(updates)); |
| 127 | } |
| 128 | |
| 129 | @Override |
| 130 | @SuppressWarnings("unchecked") |
| 131 | public synchronized CompletableFuture<Database> open() { |
| 132 | return runStartupTasks() |
| 133 | .thenCompose(v -> stateMachine.open()) |
| 134 | .thenRun(() -> { |
| 135 | this.proxy = stateMachine.createProxy(DatabaseProxy.class); |
| 136 | }) |
| 137 | .thenApply(v -> null); |
| 138 | } |
| 139 | |
| 140 | @Override |
| 141 | public synchronized CompletableFuture<Void> close() { |
| 142 | proxy = null; |
| 143 | return stateMachine.close() |
| 144 | .thenCompose(v -> runShutdownTasks()); |
| 145 | } |
| 146 | } |