@Test
public void testAcquireAndMutate() throws Exception {
final String row = "testAcquireAndMutate";
final String dataColumn = "data";
final String value = "test";
ColumnPrefixUniquenessConstraint<String> unique =
new ColumnPrefixUniquenessConstraint<String>(keyspace, UNIQUE_CF, row)
.withConsistencyLevel(ConsistencyLevel.CL_ONE)
.withUniqueId("def");
try {
unique.acquireAndApplyMutation(
new Function<MutationBatch, Boolean>() {
@Override
public Boolean apply(MutationBatch m) {
m.withRow(UNIQUE_CF, row).putColumn(dataColumn, value, null);
return true;
}
});
String column = unique.readUniqueColumn();
Assert.assertNotNull(column);
} catch (Exception e) {
e.printStackTrace();
LOG.error("", e);
Assert.fail();
} finally {
}
ColumnList<String> columns = keyspace.prepareQuery(UNIQUE_CF).getKey(row).execute().getResult();
Assert.assertEquals(2, columns.size());
Assert.assertEquals(value, columns.getStringValue(dataColumn, null));
unique.release();
columns = keyspace.prepareQuery(UNIQUE_CF).getKey(row).execute().getResult();
Assert.assertEquals(1, columns.size());
Assert.assertEquals(value, columns.getStringValue(dataColumn, null));
}
