Examples with ZNRecordAssembler org.apache.helix.ZNRecordAssembler used on opensource projects

Example 1 with ZNRecordAssembler

use of org.apache.helix.ZNRecordAssembler in project helix by apache.

the class ZKHelixDataAccessor method getProperty.

@Override
public <T extends HelixProperty> List<T> getProperty(List<PropertyKey> keys, boolean throwException) throws HelixMetaDataAccessException {
    if (keys == null || keys.size() == 0) {
        return Collections.emptyList();
    }
    List<T> childValues = new ArrayList<T>();
    // read all records
    List<String> paths = new ArrayList<>();
    List<Stat> stats = new ArrayList<>();
    for (PropertyKey key : keys) {
        paths.add(key.getPath());
        stats.add(new Stat());
    }
    List<ZNRecord> children = _baseDataAccessor.get(paths, stats, 0, throwException);
    // check if bucketized
    for (int i = 0; i < keys.size(); i++) {
        PropertyKey key = keys.get(i);
        ZNRecord record = children.get(i);
        Stat stat = stats.get(i);
        PropertyType type = key.getType();
        String path = key.getPath();
        int options = constructOptions(type);
        if (record != null) {
            record.setCreationTime(stat.getCtime());
            record.setModifiedTime(stat.getMtime());
            record.setVersion(stat.getVersion());
        }
        switch(type) {
            case CURRENTSTATES:
            case IDEALSTATES:
            case EXTERNALVIEW:
                // check if bucketized
                if (record != null) {
                    HelixProperty property = new HelixProperty(record);
                    int bucketSize = property.getBucketSize();
                    if (bucketSize > 0) {
                        // @see HELIX-574
                        // clean up list and map fields in case we write to parent node by mistake
                        property.getRecord().getMapFields().clear();
                        property.getRecord().getListFields().clear();
                        List<ZNRecord> childRecords = _baseDataAccessor.getChildren(path, null, options, 1, 0);
                        ZNRecord assembledRecord = new ZNRecordAssembler().assemble(childRecords);
                        // merge with parent node value
                        if (assembledRecord != null) {
                            record.getSimpleFields().putAll(assembledRecord.getSimpleFields());
                            record.getListFields().putAll(assembledRecord.getListFields());
                            record.getMapFields().putAll(assembledRecord.getMapFields());
                        }
                    }
                }
                break;
            default:
                break;
        }
        @SuppressWarnings("unchecked") T t = (T) HelixProperty.convertToTypedInstance(key.getTypeClass(), record);
        childValues.add(t);
    }
    return childValues;
}

Example 2 with ZNRecordAssembler

use of org.apache.helix.ZNRecordAssembler in project helix by apache.

the class ZKHelixDataAccessor method getChildValues.

@Override
public <T extends HelixProperty> List<T> getChildValues(PropertyKey key, boolean throwException) {
    PropertyType type = key.getType();
    String parentPath = key.getPath();
    int options = constructOptions(type);
    List<T> childValues = new ArrayList<T>();
    List<ZNRecord> children;
    if (throwException) {
        children = _baseDataAccessor.getChildren(parentPath, null, options, 1, 0);
    } else {
        children = _baseDataAccessor.getChildren(parentPath, null, options);
    }
    if (children != null) {
        for (ZNRecord record : children) {
            switch(type) {
                case CURRENTSTATES:
                case IDEALSTATES:
                case EXTERNALVIEW:
                    if (record != null) {
                        HelixProperty property = new HelixProperty(record);
                        int bucketSize = property.getBucketSize();
                        if (bucketSize > 0) {
                            // TODO: fix this if record.id != pathName
                            String childPath = parentPath + "/" + record.getId();
                            List<ZNRecord> childRecords;
                            if (throwException) {
                                childRecords = _baseDataAccessor.getChildren(childPath, null, options, 1, 0);
                            } else {
                                childRecords = _baseDataAccessor.getChildren(childPath, null, options);
                            }
                            ZNRecord assembledRecord = new ZNRecordAssembler().assemble(childRecords);
                            // merge with parent node value
                            if (assembledRecord != null) {
                                record.getSimpleFields().putAll(assembledRecord.getSimpleFields());
                                record.getListFields().putAll(assembledRecord.getListFields());
                                record.getMapFields().putAll(assembledRecord.getMapFields());
                            }
                        }
                    }
                    break;
                default:
                    break;
            }
            if (record != null) {
                @SuppressWarnings("unchecked") T t = (T) HelixProperty.convertToTypedInstance(key.getTypeClass(), record);
                childValues.add(t);
            }
        }
    }
    return childValues;
}

Example 3 with ZNRecordAssembler

use of org.apache.helix.ZNRecordAssembler in project helix by apache.

the class ZKHelixDataAccessor method getProperty.

@Override
public <T extends HelixProperty> T getProperty(PropertyKey key) {
    PropertyType type = key.getType();
    String path = key.getPath();
    int options = constructOptions(type);
    ZNRecord record = null;
    try {
        Stat stat = new Stat();
        record = _baseDataAccessor.get(path, stat, options);
        if (record != null) {
            record.setCreationTime(stat.getCtime());
            record.setModifiedTime(stat.getMtime());
            record.setVersion(stat.getVersion());
        }
    } catch (ZkNoNodeException e) {
    // OK
    }
    switch(type) {
        case CURRENTSTATES:
        case IDEALSTATES:
        case EXTERNALVIEW:
            // check if bucketized
            if (record != null) {
                HelixProperty property = new HelixProperty(record);
                int bucketSize = property.getBucketSize();
                if (bucketSize > 0) {
                    // @see HELIX-574
                    // clean up list and map fields in case we write to parent node by mistake
                    property.getRecord().getMapFields().clear();
                    property.getRecord().getListFields().clear();
                    List<ZNRecord> childRecords = _baseDataAccessor.getChildren(path, null, options);
                    ZNRecord assembledRecord = new ZNRecordAssembler().assemble(childRecords);
                    // merge with parent node value
                    if (assembledRecord != null) {
                        record.getSimpleFields().putAll(assembledRecord.getSimpleFields());
                        record.getListFields().putAll(assembledRecord.getListFields());
                        record.getMapFields().putAll(assembledRecord.getMapFields());
                    }
                }
            }
            break;
        default:
            break;
    }
    @SuppressWarnings("unchecked") T t = (T) HelixProperty.convertToTypedInstance(key.getTypeClass(), record);
    return t;
}