src/main/java/com/github/jnidzwetzki/bitfinex/v2/callback/channel/RawOrderbookHandler.java
/*******************************************************************************
*
* Copyright (C) 2015-2018 Jan Kristof Nidzwetzki
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*******************************************************************************/
package com.github.jnidzwetzki.bitfinex.v2.callback.channel;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.function.BiConsumer;
import org.json.JSONArray;
import org.json.JSONException;
import com.github.jnidzwetzki.bitfinex.v2.entity.BitfinexOrderBookEntry;
import com.github.jnidzwetzki.bitfinex.v2.exception.BitfinexClientException;
import com.github.jnidzwetzki.bitfinex.v2.symbol.BitfinexOrderBookSymbol;
import com.github.jnidzwetzki.bitfinex.v2.symbol.BitfinexStreamSymbol;
public class RawOrderbookHandler implements ChannelCallbackHandler {
private final int channelId;
private final BitfinexOrderBookSymbol symbol;
private BiConsumer<BitfinexOrderBookSymbol, Collection<BitfinexOrderBookEntry>> orderbookEntryConsumer = (c, e) -> {};
public RawOrderbookHandler(int channelId, final BitfinexOrderBookSymbol symbol) {
this.channelId = channelId;
this.symbol = symbol;
}
/**
* {@inheritDoc}
*/
@Override
public void handleChannelData(final String action, final JSONArray jsonArray) throws BitfinexClientException {
// Example: [13182,1,-0.1]
try {
final List<BitfinexOrderBookEntry> entries = new ArrayList<>();
// Snapshots contain multiple Orderbook entries, updates only one
if (jsonArray.get(0) instanceof JSONArray) {
for (int pos = 0; pos < jsonArray.length(); pos++) {
final JSONArray part = jsonArray.getJSONArray(pos);
BitfinexOrderBookEntry entry = jsonToRawOrderbookEntry(part);
entries.add(entry);
}
} else {
BitfinexOrderBookEntry entry = jsonToRawOrderbookEntry(jsonArray);
entries.add(entry);
}
orderbookEntryConsumer.accept(symbol, entries);
} catch (JSONException e) {
throw new BitfinexClientException(e);
}
}
@Override
public BitfinexStreamSymbol getSymbol() {
return symbol;
}
@Override
public int getChannelId() {
return channelId;
}
private BitfinexOrderBookEntry jsonToRawOrderbookEntry(final JSONArray jsonArray) {
final long orderId = jsonArray.getNumber(0).longValue();
final BigDecimal price = jsonArray.getBigDecimal(1);
final BigDecimal amount = jsonArray.getBigDecimal(2);
return new BitfinexOrderBookEntry(orderId, price, amount, null);
}
public void onOrderbookEvent(BiConsumer<BitfinexOrderBookSymbol, Collection<BitfinexOrderBookEntry>> consumer) {
this.orderbookEntryConsumer = consumer;
}
}