com.github.triceo.robozonky.app.investing.Activity Maven / Gradle / Ivy
/*
* Copyright 2017 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.triceo.robozonky.app.investing;
import java.time.Duration;
import java.time.Instant;
import java.time.OffsetDateTime;
import java.time.format.DateTimeParseException;
import java.time.temporal.TemporalAmount;
import java.util.ArrayList;
import java.util.Collection;
import java.util.concurrent.atomic.AtomicReference;
import com.github.triceo.robozonky.api.strategies.LoanDescriptor;
import com.github.triceo.robozonky.internal.api.Defaults;
import com.github.triceo.robozonky.internal.api.State;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Decides whether or not the application should fall asleep because of general marketplace inactivity. Uses two sources
* of data to make the decision: the marketplace, and the app's internal state concerning the last time the marketplace
* was checked.
*
* In order for the state to be persisted, the App needs to eventually call {@link #settle()} after calling
* {@link #shouldSleep()}.
*/
class Activity {
private static final Runnable DO_NOTHING = () -> {
};
private static final Logger LOGGER = LoggerFactory.getLogger(Activity.class);
private static final OffsetDateTime EPOCH = OffsetDateTime.ofInstant(Instant.EPOCH, Defaults.ZONE_ID);
static final State.ClassSpecificState STATE = State.forClass(Activity.class);
static final String LAST_MARKETPLACE_CHECK_STATE_ID = "lastMarketplaceCheck";
private final TemporalAmount sleepInterval;
private final Collection recentLoansDescending;
private final AtomicReference settler = new AtomicReference<>(Activity.DO_NOTHING);
Activity(final Collection loans) {
this(loans, Duration.ofMinutes(60));
}
public Activity(final Collection loans, final TemporalAmount maximumSleepPeriod) {
this.sleepInterval = maximumSleepPeriod;
this.recentLoansDescending = new ArrayList<>(loans);
}
static OffsetDateTime getLatestMarketplaceAction() {
return Activity.STATE.getValue(Activity.LAST_MARKETPLACE_CHECK_STATE_ID).map(s -> {
try {
return OffsetDateTime.parse(s);
} catch (final DateTimeParseException ex) {
Activity.LOGGER.debug("Failed read marketplace timestamp.", ex);
return Activity.EPOCH;
}
}).orElse(Activity.EPOCH);
}
private boolean hasLoansNewerThan(final OffsetDateTime instant) {
return this.recentLoansDescending.stream()
.anyMatch(l -> l.item().getDatePublished().isAfter(instant));
}
private boolean hasUnactionableLoans() {
final OffsetDateTime now = OffsetDateTime.now();
return this.recentLoansDescending.stream()
.anyMatch(l -> l.getLoanCaptchaProtectionEndDateTime()
.map(captchaEnds -> captchaEnds.isAfter(now))
.orElse(false));
}
/**
* Whether or not the application should fall asleep and not make any further contact with API.
* @return True if no further contact should be made during this run of the app.
*/
public boolean shouldSleep() {
final OffsetDateTime lastKnownAction = Activity.getLatestMarketplaceAction();
final boolean hasUnactionableLoans = this.hasUnactionableLoans();
final boolean shouldSleep;
if (lastKnownAction.plus(this.sleepInterval).isBefore(OffsetDateTime.now())) {
// try investing since we haven't tried in a while; maybe we have some more funds now
shouldSleep = false;
} else {
// try investing if we have some unseen loans
final boolean hasUnseenLoans = this.hasLoansNewerThan(lastKnownAction);
shouldSleep = !(hasUnseenLoans || hasUnactionableLoans);
}
// only change marketplace check timestamp when we're intending to call some actual investing.
this.settler.set(shouldSleep ? null : () -> this.persist(hasUnactionableLoans));
return shouldSleep;
}
/**
* Persists the new marketplace state following a {@link #shouldSleep()} call.
*/
public void settle() {
this.settler.getAndSet(Activity.DO_NOTHING).run();
}
private void persist(final boolean hasUnactionableLoans) {
// make sure the unactionable marketplace are never included in the time the marketplace was last checked
final OffsetDateTime result = hasUnactionableLoans ?
OffsetDateTime.now().minus(Duration.from(ResultTracker.CAPTCHA_DELAY).plus(Duration.ofSeconds(30)))
: OffsetDateTime.now();
Activity.STATE.newBatch().set(Activity.LAST_MARKETPLACE_CHECK_STATE_ID, result.toString()).call();
Activity.LOGGER.debug("New marketplace last checked time is {}.", result);
}
}