/
ModifyFeatureDefinitionStrategy.java
94 lines (79 loc) · 4.21 KB
/
ModifyFeatureDefinitionStrategy.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
/*
* Copyright (c) 2017-2018 Bosch Software Innovations GmbH.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/org/documents/epl-2.0/index.php
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.services.things.persistence.actors.strategies.commands;
import java.util.Optional;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
import org.eclipse.ditto.model.base.headers.DittoHeaders;
import org.eclipse.ditto.model.things.Feature;
import org.eclipse.ditto.model.things.FeatureDefinition;
import org.eclipse.ditto.model.things.Thing;
import org.eclipse.ditto.signals.commands.things.modify.ModifyFeatureDefinition;
import org.eclipse.ditto.signals.commands.things.modify.ModifyFeatureDefinitionResponse;
import org.eclipse.ditto.signals.events.things.FeatureDefinitionCreated;
import org.eclipse.ditto.signals.events.things.FeatureDefinitionModified;
/**
* This strategy handles the {@link org.eclipse.ditto.signals.commands.things.modify.ModifyFeatureDefinition} command.
*/
@Immutable
final class ModifyFeatureDefinitionStrategy
extends AbstractConditionalHeadersCheckingCommandStrategy<ModifyFeatureDefinition, FeatureDefinition> {
/**
* Constructs a new {@code ModifyFeatureDefinitionStrategy} object.
*/
ModifyFeatureDefinitionStrategy() {
super(ModifyFeatureDefinition.class);
}
@Override
protected Result doApply(final Context context, @Nullable final Thing thing,
final long nextRevision, final ModifyFeatureDefinition command) {
final String featureId = command.getFeatureId();
return extractFeature(command, thing)
.map(feature -> getModifyOrCreateResult(feature, context, nextRevision, command))
.orElseGet(() -> ResultFactory.newErrorResult(
ExceptionFactory.featureNotFound(context.getThingId(), featureId, command.getDittoHeaders())));
}
private Optional<Feature> extractFeature(final ModifyFeatureDefinition command, final @Nullable Thing thing) {
return getThingOrThrow(thing).getFeatures()
.flatMap(features -> features.getFeature(command.getFeatureId()));
}
private Result getModifyOrCreateResult(final Feature feature, final Context context,
final long nextRevision, final ModifyFeatureDefinition command) {
return feature.getDefinition()
.map(definition -> getModifyResult(context, nextRevision, command))
.orElseGet(() -> getCreateResult(context, nextRevision, command));
}
private Result getModifyResult(final Context context, final long nextRevision,
final ModifyFeatureDefinition command) {
final String thingId = context.getThingId();
final DittoHeaders dittoHeaders = command.getDittoHeaders();
final String featureId = command.getFeatureId();
return ResultFactory.newMutationResult(command,
FeatureDefinitionModified.of(thingId, featureId, command.getDefinition(),
nextRevision, getEventTimestamp(), dittoHeaders),
ModifyFeatureDefinitionResponse.modified(thingId, featureId, dittoHeaders), this);
}
private Result getCreateResult(final Context context, final long nextRevision,
final ModifyFeatureDefinition command) {
final String thingId = context.getThingId();
final DittoHeaders dittoHeaders = command.getDittoHeaders();
final String featureId = command.getFeatureId();
return ResultFactory.newMutationResult(command, FeatureDefinitionCreated.of(thingId, featureId, command.getDefinition(),
nextRevision, getEventTimestamp(), dittoHeaders),
ModifyFeatureDefinitionResponse.created(thingId, featureId, command.getDefinition(), dittoHeaders),
this);
}
@Override
public Optional<FeatureDefinition> determineETagEntity(final ModifyFeatureDefinition command,
@Nullable final Thing thing) {
return extractFeature(command, thing).flatMap(Feature::getDefinition);
}
}