Examples with BackendEntry com.baidu.hugegraph.backend.store.BackendEntry used on opensource projects

Example 1 with BackendEntry

use of com.baidu.hugegraph.backend.store.BackendEntry in project incubator-hugegraph by apache.

the class CassandraEntryIterator method fetch.

@Override
protected final boolean fetch() {
    assert this.current == null;
    if (this.next != null) {
        this.current = this.next;
        this.next = null;
    }
    while (this.expected > 0L && this.rows.hasNext()) {
        // Limit expected count, due to rows.hasNext() will fetch next page
        this.expected--;
        Row row = this.rows.next();
        if (this.query.paging()) {
            // Update fetchdPageSize if auto fetch the next page
            if (this.expected > 0L && this.availableLocal() == 0) {
                if (this.rows.hasNext()) {
                    this.fetchdPageSize = this.availableLocal();
                }
            }
        }
        BackendEntry merged = this.merger.apply(this.current, row);
        if (this.current == null) {
            // The first time to read
            this.current = merged;
        } else if (merged == this.current) {
            // The next entry belongs to the current entry
            assert merged != null;
        } else {
            // New entry
            assert this.next == null;
            this.next = merged;
            break;
        }
    }
    return this.current != null;
}

Example 2 with BackendEntry

use of com.baidu.hugegraph.backend.store.BackendEntry in project incubator-hugegraph by apache.

the class RocksDBStore method mutate.

private void mutate(Session session, BackendAction item) {
    BackendEntry entry = item.entry();
    RocksDBTable table;
    if (!entry.olap()) {
        // Oltp table
        table = this.table(entry.type());
    } else {
        if (entry.type().isIndex()) {
            // Olap index
            table = this.table(this.olapTableName(entry.type()));
        } else {
            // Olap vertex
            table = this.table(this.olapTableName(entry.subId()));
        }
        session = this.session(HugeType.OLAP);
    }
    switch(item.action()) {
        case INSERT:
            table.insert(session, entry);
            break;
        case DELETE:
            table.delete(session, entry);
            break;
        case APPEND:
            table.append(session, entry);
            break;
        case ELIMINATE:
            table.eliminate(session, entry);
            break;
        default:
            throw new AssertionError(String.format("Unsupported mutate action: %s", item.action()));
    }
}

Example 3 with BackendEntry

use of com.baidu.hugegraph.backend.store.BackendEntry in project incubator-hugegraph by apache.

the class BackendMutationTest method testDeleteAndInsertEntry.

@Test
public void testDeleteAndInsertEntry() {
    BackendMutation mutation = new BackendMutation();
    BackendEntry entry1 = constructBackendEntry("1");
    BackendEntry entry2 = constructBackendEntry("2");
    BackendEntry entry3 = constructBackendEntry("1");
    mutation.add(entry1, Action.DELETE);
    mutation.add(entry2, Action.DELETE);
    mutation.add(entry3, Action.INSERT);
    Assert.assertEquals(1, get(mutation, "1").size());
    Assert.assertEquals(Action.INSERT, get(mutation, "1").get(0).action());
    Assert.assertEquals(1, get(mutation, "2").size());
    Assert.assertEquals(Action.DELETE, get(mutation, "2").get(0).action());
}

Example 4 with BackendEntry

use of com.baidu.hugegraph.backend.store.BackendEntry in project incubator-hugegraph by apache.

the class BackendMutationTest method testAppendAndDeleteEntry.

@Test
public void testAppendAndDeleteEntry() {
    BackendMutation mutation = new BackendMutation();
    BackendEntry entry1 = constructBackendEntry("1", "name", "marko");
    BackendEntry entry2 = constructBackendEntry("1");
    mutation.add(entry1, Action.APPEND);
    mutation.add(entry2, Action.DELETE);
    Assert.assertEquals(1, get(mutation, "1").size());
    Assert.assertEquals(Action.DELETE, get(mutation, "1").get(0).action());
}

Example 5 with BackendEntry

use of com.baidu.hugegraph.backend.store.BackendEntry in project incubator-hugegraph by apache.

the class BackendMutationTest method testEliminateAndEliminateEntryWithSameId.

@Test
public void testEliminateAndEliminateEntryWithSameId() {
    BackendMutation mutation = new BackendMutation();
    BackendEntry entry1 = constructBackendEntry("1", "name", "marko");
    BackendEntry entry2 = constructBackendEntry("1", "city", "Wuhan");
    mutation.add(entry1, Action.ELIMINATE);
    mutation.add(entry2, Action.ELIMINATE);
    Assert.assertEquals(2, get(mutation, "1").size());
    Assert.assertEquals(Action.ELIMINATE, get(mutation, "1").get(0).action());
    Assert.assertEquals(Action.ELIMINATE, get(mutation, "1").get(1).action());
}