private List<KnapsackState> get(String name) throws IOException {
ImmutableList.Builder<KnapsackState> builder = ImmutableList.builder();
try {
logger.debug("get knapsack states: {}", name);
final Client client = injector.getInstance(Client.class);
createIndexIfNotExist(client);
GetResponse getResponse =
client.prepareGet(INDEX_NAME, MAPPING_NAME, name).execute().actionGet();
if (!getResponse.isExists()) {
return builder.build();
}
XContentParser parser = xContent(JSON).createParser(getResponse.getSourceAsBytes());
while (parser.nextToken() != START_ARRAY) {
// forward
}
while (parser.nextToken() != END_ARRAY) {
KnapsackState state = new KnapsackState();
builder.add(state.fromXContent(parser));
}
return builder.build();
} catch (Throwable t) {
logger.error("get settings failed", t);
return null;
}
}
private static XContentBuilder generate(List<KnapsackState> values) throws IOException {
XContentBuilder builder = jsonBuilder();
builder.startObject();
builder.startArray("array");
for (KnapsackState value : values) {
value.toXContent(builder, EMPTY_PARAMS);
}
builder.endArray();
builder.endObject();
return builder;
}
private void remove(String name, List<KnapsackState> values, KnapsackState targetValue)
throws IOException {
logger.debug("remove: {} -> {}", name, values);
ImmutableList.Builder<KnapsackState> updatedValues = ImmutableList.builder();
for (KnapsackState value : values) {
if (!value.equals(targetValue)) {
updatedValues.add(value);
}
}
put(name, generate(updatedValues.build()));
}
