com.github.robozonky.app.daemon.AbstractSession Maven / Gradle / Ivy
/*
* Copyright 2020 The RoboZonky Project
*
* 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.robozonky.app.daemon;
import java.util.ArrayList;
import java.util.List;
import java.util.function.ToLongFunction;
import java.util.stream.Stream;
import javax.ws.rs.core.Response;
import org.apache.logging.log4j.Logger;
import com.github.robozonky.api.strategies.Descriptor;
import com.github.robozonky.app.tenant.PowerTenant;
import com.github.robozonky.internal.remote.endpoints.ControlApi;
abstract class AbstractSession, S extends Descriptor, X> {
protected final PowerTenant tenant;
protected final Logger logger;
protected final List result = new ArrayList<>(0);
private final Stream stillAvailable;
private final SessionState discarded;
protected AbstractSession(final Stream originallyAvailable, final PowerTenant tenant,
final ToLongFunction idSupplier, final String stateId, final Logger logger) {
this.tenant = tenant;
this.logger = logger;
// These are only instantiated on-demand, so that the stream is only collected when absolutely necessary.
this.stillAvailable = originallyAvailable;
this.discarded = new SessionState<>(tenant, idSupplier, stateId);
}
/**
* Get items that are available to be evaluated by the strategy. These are items that come from the marketplace,
* minus items that are already {@link #discard(Descriptor)}ed.
*
* @return Items in the marketplace in which the user could still potentially invest.
*/
Stream getAvailable() {
return stillAvailable
.filter(s -> !discarded.contains(s));
}
protected void discard(final S item) {
logger.debug("Will not show {} again.", item);
discarded.put(item);
}
protected boolean isBalanceAcceptable(final T item) {
return item.amount()
.compareTo(tenant.getKnownBalanceUpperBound()) <= 0;
}
/**
* Request {@link ControlApi} to invest in a given item.
*
* @param recommendation Item to invest into.
* @return True if investment successful. The investment is reflected in {@link #getResult()} and removed from
* {@link #getAvailable()}.
*/
protected abstract boolean accept(final T recommendation);
/**
* Get investments made during this session.
*
* @return Investments made so far during this session. Unmodifiable.
*/
Stream getResult() {
return result.stream();
}
protected String getResponseEntity(final Response response) {
if (!response.hasEntity()) {
return "";
}
response.bufferEntity(); // allow for repeated queries over the same Response instance
var contents = response.readEntity(String.class);
logger.debug("Response body is: {}", contents);
return contents;
}
}