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/**
* Copyright (c) 2009-2016, netbout.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are PROHIBITED without prior written permission from
* the author. This product may NOT be used anywhere and on any computer
* except the server platform of netbout Inc. located at www.netbout.com.
* Federal copyright law prohibits unauthorized reproduction by any means
* and imposes fines up to $25,000 for violation. If you received
* this code accidentally and without intent to use it, please report this
* incident to the author by email.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
package com.netbout.dynamo;
import co.stateful.Counter;
import co.stateful.RtSttc;
import co.stateful.cached.CdSttc;
import co.stateful.retry.ReSttc;
import com.amazonaws.services.dynamodbv2.model.AttributeAction;
import com.amazonaws.services.dynamodbv2.model.AttributeValue;
import com.amazonaws.services.dynamodbv2.model.AttributeValueUpdate;
import com.amazonaws.services.dynamodbv2.model.ComparisonOperator;
import com.amazonaws.services.dynamodbv2.model.Condition;
import com.google.common.base.Function;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.jcabi.aspects.Async;
import com.jcabi.aspects.Cacheable;
import com.jcabi.aspects.Immutable;
import com.jcabi.aspects.Loggable;
import com.jcabi.aspects.Tv;
import com.jcabi.dynamo.AttributeUpdates;
import com.jcabi.dynamo.Attributes;
import com.jcabi.dynamo.Conditions;
import com.jcabi.dynamo.Item;
import com.jcabi.dynamo.QueryValve;
import com.jcabi.dynamo.Region;
import com.jcabi.log.Logger;
import com.jcabi.manifests.Manifests;
import com.jcabi.urn.URN;
import com.netbout.spi.Inbox;
import com.netbout.spi.Message;
import com.netbout.spi.Messages;
import com.netbout.spi.Pageable;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import lombok.EqualsAndHashCode;
import lombok.ToString;
import org.apache.commons.lang3.StringUtils;
/**
* Dynamo messages.
* @todo #603:30min Refactor DyMessages class to avoid suppressing of
* PMD.TooManyMethods and PMD.ExcessiveImports warnings. for example
* there are some private static methods there, those could be easily
* extracted.
* @author Yegor Bugayenko ([email protected])
* @version $Id: 32fcc15cf3e6146dc5bd8413467198a409470ba6 $
* @since 2.0
* @checkstyle ClassDataAbstractionCouplingCheck (500 lines)
*/
@Immutable
@Loggable(Loggable.DEBUG)
@ToString(of = "bout")
@EqualsAndHashCode(of = { "counter", "region", "bout", "self", "start" })
@SuppressWarnings({ "PMD.TooManyMethods", "PMD.ExcessiveImports" })
final class DyMessages implements Messages {
/**
* Table name.
*/
public static final String TBL = "messages";
/**
* Bout attribute.
*/
public static final String HASH = "bout";
/**
* Message attribute.
*/
public static final String RANGE = "message";
/**
* Text of the message.
*/
public static final String ATTR_TEXT = "text";
/**
* Author of the message.
*/
public static final String ATTR_ALIAS = "alias";
/**
* Date of the message.
*/
public static final String ATTR_DATE = "date";
/**
* Counter with message number.
*/
private final transient Counter counter;
/**
* Region to work with.
*/
private final transient Region region;
/**
* Bout number.
*/
private final transient long bout;
/**
* My own alias.
*/
private final transient String self;
/**
* Start.
*/
private final transient long start;
/**
* Ctor.
* @param reg Region
* @param num Bout number
* @param slf Self alias
*/
DyMessages(final Region reg, final long num, final String slf) {
this(reg, num, slf, DyMessages.sttc(), Inbox.NEVER);
}
/**
* Ctor.
* @param reg Region
* @param num Bout number
* @param slf Self alias
* @param ctr Counter
* @param strt Start message number
* @since 2.7.1
* @checkstyle ParameterNumberCheck (5 lines)
*/
DyMessages(final Region reg, final long num, final String slf,
final Counter ctr, final long strt) {
this.region = reg;
this.bout = num;
this.self = slf;
this.counter = ctr;
this.start = strt;
}
@Override
public void post(final String text) throws IOException {
final String clean = StringUtils.stripEnd(text, null);
if (clean.isEmpty()) {
throw new Messages.BrokenPostException(
"empty message content is not allowed"
);
}
if (clean.length() > Tv.TEN * Tv.THOUSAND) {
throw new Messages.BrokenPostException(
"message is too big, break it into parts or upload attachment"
);
}
final long number = this.counter.incrementAndGet(1L);
this.region.table(DyMessages.TBL).put(
new Attributes()
.with(DyMessages.HASH, this.bout)
.with(DyMessages.RANGE, number)
.with(DyMessages.ATTR_TEXT, clean)
.with(DyMessages.ATTR_ALIAS, this.self)
.with(DyMessages.ATTR_DATE, System.currentTimeMillis())
);
this.updated();
Logger.info(this, "posted to #%d by @%s", this.bout, this.self);
}
@Override
public long unread() throws IOException {
final Item item = this.region.table(DyFriends.TBL)
.frame()
.through(
new QueryValve()
.withLimit(1)
.withAttributesToGet(DyFriends.ATTR_UNREAD)
)
.where(DyFriends.HASH, Conditions.equalTo(this.bout))
.where(DyFriends.RANGE, Conditions.equalTo(this.self))
.iterator().next();
final long unread;
if (item.has(DyFriends.ATTR_UNREAD)) {
unread = Long.parseLong(item.get(DyFriends.ATTR_UNREAD).getN());
} else {
unread = 0L;
}
return unread;
}
@Override
public Pageable jump(final long number) {
return new DyMessages(
this.region, this.bout, this.self, this.counter, number
);
}
@Override
public Iterable iterate() {
if (this.start != Long.MAX_VALUE) {
this.seen();
}
return Iterables.transform(
this.region.table(DyMessages.TBL)
.frame()
.through(
new QueryValve()
.withScanIndexForward(false)
.withLimit(Messages.PAGE)
.withAttributesToGet(
DyMessages.ATTR_TEXT,
DyMessages.ATTR_ALIAS,
DyMessages.ATTR_DATE
)
)
.where(DyMessages.HASH, Conditions.equalTo(this.bout))
.where(
DyMessages.RANGE,
new Condition()
.withComparisonOperator(ComparisonOperator.LT)
.withAttributeValueList(
new AttributeValue().withN(
Long.toString(this.start)
)
)
),
new Function() {
@Override
public Message apply(final Item item) {
return new DyMessage(item);
}
}
);
}
@Override
public Iterable search(final String term) throws IOException {
final List result = new ArrayList<>(16);
for (final Message message : this.iterate()) {
if (message.text().contains(term)) {
result.add(message);
}
}
return result;
}
/**
* It was updated just now.
*/
@Async
private void updated() {
final String alias = this.self;
Iterables.all(
this.region.table(DyFriends.TBL).frame()
.through(new QueryValve())
.where(DyFriends.HASH, Conditions.equalTo(this.bout)),
// @checkstyle AnonInnerLengthCheck (50 lines)
new Predicate() {
@Override
public boolean apply(final Item input) {
AttributeUpdates updates = new AttributeUpdates().with(
DyFriends.ATTR_UPDATED,
System.currentTimeMillis()
);
try {
if (!input.get(DyFriends.RANGE).getS().equals(alias)) {
updates = updates.with(
DyFriends.ATTR_UNREAD,
new AttributeValueUpdate()
.withAction(AttributeAction.ADD)
.withValue(new AttributeValue().withN("1"))
);
}
input.put(updates);
} catch (final IOException ex) {
throw new IllegalStateException(ex);
}
return true;
}
}
);
}
/**
* It was seen just now.
*/
@Async
private void seen() {
Iterables.all(
this.region.table(DyFriends.TBL).frame()
.through(new QueryValve())
.where(DyFriends.HASH, Conditions.equalTo(this.bout))
.where(DyFriends.RANGE, this.self),
new Predicate() {
@Override
public boolean apply(final Item input) {
try {
input.put(
new AttributeUpdates().with(
DyFriends.ATTR_UNREAD, 0L
)
);
} catch (final IOException ex) {
throw new IllegalStateException(ex);
}
return true;
}
}
);
}
/**
* Sttc counter.
* @return Counter
*/
@Cacheable(forever = true)
private static Counter sttc() {
try {
return new CdSttc(
new ReSttc(
RtSttc.make(
URN.create(Manifests.read("Netbout-SttcUrn")),
Manifests.read("Netbout-SttcToken")
)
)
).counters().get("nb-message");
} catch (final IOException ex) {
throw new IllegalStateException(ex);
}
}
}
