com.netbout.dynamo.DyInbox Maven / Gradle / Ivy
/**
* 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,
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* 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.AttributeValue;
import com.amazonaws.services.dynamodbv2.model.ComparisonOperator;
import com.amazonaws.services.dynamodbv2.model.Condition;
import com.amazonaws.services.dynamodbv2.model.Select;
import com.google.common.base.Function;
import com.google.common.collect.Iterables;
import com.jcabi.aspects.Cacheable;
import com.jcabi.aspects.Immutable;
import com.jcabi.aspects.Loggable;
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.Bout;
import com.netbout.spi.Inbox;
import com.netbout.spi.Pageable;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import lombok.EqualsAndHashCode;
import lombok.ToString;
/**
* Dynamo inbox.
* @todo #603:30min Refactor DyInbox 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: 5771af8e558f4afba6169ab2e666277cd3fe5953 $
* @since 2.0
* @checkstyle ClassDataAbstractionCouplingCheck (500 lines)
*/
@Immutable
@Loggable(Loggable.DEBUG)
@ToString(of = "self")
@EqualsAndHashCode(of = { "counter", "region", "self", "since" })
@SuppressWarnings({ "PMD.TooManyMethods", "PMD.ExcessiveImports" })
final class DyInbox implements Inbox {
/**
* Counter with bout number.
*/
private final transient Counter counter;
/**
* Region we're in.
*/
private final transient Region region;
/**
* Alias of myself.
*/
private final transient String self;
/**
* Start moment.
*/
private final transient long since;
/**
* Ctor.
* @param reg Region we're in
* @param slf My alias
*/
DyInbox(final Region reg, final String slf) {
this(reg, slf, DyInbox.sttc(), Inbox.NEVER);
}
/**
* Ctor.
* @param reg Region we're in
* @param slf My alias
* @param ctr Counter
* @param strt Start
* @since 2.7.1
* @checkstyle ParameterNumberCheck (5 lines)
*/
DyInbox(final Region reg, final String slf, final Counter ctr,
final long strt) {
this.region = reg;
this.self = slf;
this.counter = ctr;
this.since = strt;
}
@Override
public long start() throws IOException {
final long number = this.counter.incrementAndGet(1L);
this.region.table(DyFriends.TBL).put(
new Attributes()
.with(DyFriends.RANGE, this.self)
.with(DyFriends.HASH, number)
.with(DyFriends.ATTR_SUBSCRIPTION, true)
.with(DyFriends.ATTR_UPDATED, System.currentTimeMillis())
.with(DyFriends.ATTR_TITLE, "untitled")
);
Logger.info(this, "bout #%d started by @%s", number, this.self);
return number;
}
// @todo #1:30min DynamoDBLocal doesn't work with all attributes
// in global index. If we remove this check for a local version,
// most tests fail. I'm not sure how to fix that. I suspect, it's
// a bug in DynamoDBLocal, but I don't even know how to report
// it to them :( Anyway, let's try to investigate and either fix
// property or introduce a better workaround. Pay attention that this
// code works correctly in production.
@Override
public long unread() throws IOException {
long unread = 0L;
if (!"1.0-LOCAL".equals(Manifests.read("Netbout-Version"))) {
final Iterable- items = this.region.table(DyFriends.TBL)
.frame()
.where(DyFriends.RANGE, this.self)
.through(
new QueryValve()
.withIndexName(DyFriends.INDEX)
.withConsistentRead(false)
.withSelect(Select.SPECIFIC_ATTRIBUTES)
.withAttributesToGet(DyFriends.ATTR_UNREAD)
.withScanIndexForward(false)
);
for (final Item item : items) {
if (item.has(DyFriends.ATTR_UNREAD)) {
unread += Long.parseLong(
item.get(DyFriends.ATTR_UNREAD).getN()
);
}
}
}
return unread;
}
@Override
@Loggable(
value = Loggable.DEBUG,
ignore = Inbox.BoutNotFoundException.class
)
public Bout bout(final long number) throws Inbox.BoutNotFoundException {
final Iterator
- items = this.region.table(DyFriends.TBL)
.frame()
.through(
new QueryValve().withLimit(1)
.withSelect(Select.SPECIFIC_ATTRIBUTES)
.withAttributesToGet(
DyFriends.HASH, DyFriends.RANGE
)
)
.where(DyFriends.HASH, Conditions.equalTo(number))
.where(DyFriends.RANGE, this.self)
.iterator();
if (!items.hasNext()) {
throw new Inbox.BoutNotFoundException(number);
}
return new DyBout(this.region, items.next(), this.self);
}
@Override
public Pageable
jump(final long number) {
return new DyInbox(this.region, this.self, this.counter, number);
}
@Override
public Iterable iterate() {
return Iterables.transform(
this.region.table(DyFriends.TBL)
.frame()
.where(DyFriends.RANGE, this.self)
.where(
DyFriends.ATTR_UPDATED,
new Condition()
.withComparisonOperator(ComparisonOperator.LT)
.withAttributeValueList(
new AttributeValue().withN(
Long.toString(this.since)
)
)
)
.through(
new QueryValve()
.withIndexName(DyFriends.INDEX)
.withConsistentRead(false)
.withLimit(Inbox.PAGE)
.withSelect(Select.ALL_PROJECTED_ATTRIBUTES)
.withScanIndexForward(false)
),
new Function() {
@Override
public Bout apply(final Item item) {
return new Bout.ReadOnly(
new DyBout(
DyInbox.this.region,
item, DyInbox.this.self
)
);
}
}
);
}
@Override
public Iterable search(final String term) throws IOException {
final List result = new ArrayList<>(16);
for (final Bout bout : this.iterate()) {
if (bout.messages().search(term).iterator().hasNext()) {
result.add(bout);
}
}
return result;
}
/**
* 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-bout");
} catch (final IOException ex) {
throw new IllegalStateException(ex);
}
}
}
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