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 void remove(final String name) {
try {
logger.debug("remove: {}", name);
final Client client = injector.getInstance(Client.class);
createIndexIfNotExist(client);
client.prepareDelete(INDEX_NAME, MAPPING_NAME, name).setRefresh(true).execute().actionGet();
} catch (Throwable t) {
logger.error("remove failed", t);
}
}
private void put(final String name, final XContentBuilder builder) {
try {
logger.debug("put knapsack state: {} -> {}", name, builder.string());
final Client client = injector.getInstance(Client.class);
createIndexIfNotExist(client);
client
.prepareIndex(INDEX_NAME, MAPPING_NAME, name)
.setSource(builder)
.setRefresh(true)
.execute()
.actionGet();
} catch (Throwable t) {
logger.error("update settings failed", t);
}
}