-
Notifications
You must be signed in to change notification settings - Fork 214
/
DefaultNamespaceAppender.java
115 lines (102 loc) · 5.12 KB
/
DefaultNamespaceAppender.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
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
/*
* Copyright (c) 2022 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.edge.service.dispatching.signaltransformer;
import java.util.Optional;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;
import javax.annotation.Nullable;
import org.eclipse.ditto.base.model.headers.DittoHeaders;
import org.eclipse.ditto.base.model.signals.Signal;
import org.eclipse.ditto.base.service.signaltransformer.SignalTransformer;
import org.eclipse.ditto.json.JsonObject;
import org.eclipse.ditto.policies.model.Policy;
import org.eclipse.ditto.policies.model.PolicyId;
import org.eclipse.ditto.policies.model.signals.commands.modify.CreatePolicy;
import org.eclipse.ditto.things.model.Thing;
import org.eclipse.ditto.things.model.ThingId;
import org.eclipse.ditto.things.model.signals.commands.modify.CreateThing;
import com.typesafe.config.Config;
import org.apache.pekko.actor.ActorSystem;
import org.apache.pekko.japi.pf.PFBuilder;
import scala.PartialFunction;
/**
* Appends the globally configured {@link #DEFAULT_NAMESPACE_CONFIG_KEY Default namespace} to creation
* commands which do not include an explicit namespace.
*/
public final class DefaultNamespaceAppender implements SignalTransformer {
private static final String DEFAULT_NAMESPACE_CONFIG_KEY = "default-namespace";
private static final String FALLBACK_DEFAULT_NAMESPACE = "org.eclipse.ditto";
private final String defaultNamespace;
private final PartialFunction<Signal<?>, Signal<?>> signalTransformer;
/**
* Constructs a new instance of DefaultNamespaceAppender extension.
*
* @param actorSystem the actor system in which to load the extension.
* @param config the config the extension is configured.
*/
@SuppressWarnings("unused")
public DefaultNamespaceAppender(final ActorSystem actorSystem, final Config config) {
defaultNamespace = config.hasPath(DEFAULT_NAMESPACE_CONFIG_KEY) ?
config.getString(DEFAULT_NAMESPACE_CONFIG_KEY) :
FALLBACK_DEFAULT_NAMESPACE;
signalTransformer = new PFBuilder<Signal<?>, Signal<?>>()
.match(CreateThing.class, this::handleCreateThing)
.match(CreatePolicy.class, this::handleCreatePolicy)
.matchAny(signal -> signal)
.build();
}
public DefaultNamespaceAppender(final String defaultNamespace) {
this.defaultNamespace = defaultNamespace;
signalTransformer = new PFBuilder<Signal<?>, Signal<?>>()
.match(CreateThing.class, this::handleCreateThing)
.match(CreatePolicy.class, this::handleCreatePolicy)
.matchAny(signal -> signal)
.build();
}
@Override
public CompletionStage<Signal<?>> apply(final Signal<?> signal) {
return CompletableFuture.completedStage(signalTransformer.apply(signal));
}
private CreateThing handleCreateThing(final CreateThing createThing) {
final Optional<ThingId> providedThingId = createThing.getThing().getEntityId();
final ThingId namespacedThingId = providedThingId
.map(thingId -> {
if (thingId.getNamespace().isEmpty()) {
return ThingId.of(defaultNamespace, thingId.getName());
} else {
return thingId;
}
})
.orElseGet(() -> ThingId.inNamespaceWithRandomName(defaultNamespace));
final Thing thingWithNamespacedId = createThing.getThing().toBuilder().setId(namespacedThingId).build();
@Nullable final JsonObject initialPolicy = createThing.getInitialPolicy().orElse(null);
@Nullable final String policyIdOrPlaceholder = createThing.getPolicyIdOrPlaceholder().orElse(null);
final DittoHeaders dittoHeaders = createThing.getDittoHeaders();
return CreateThing.of(thingWithNamespacedId, initialPolicy, policyIdOrPlaceholder, dittoHeaders);
}
private CreatePolicy handleCreatePolicy(final CreatePolicy createPolicy) {
final Optional<PolicyId> providedPolicyId = createPolicy.getPolicy().getEntityId();
final PolicyId namespacedPolicyId = providedPolicyId
.map(policyId -> {
if (policyId.getNamespace().isEmpty()) {
return PolicyId.of(defaultNamespace, policyId.getName());
} else {
return policyId;
}
})
.orElseGet(() -> PolicyId.inNamespaceWithRandomName(defaultNamespace));
final Policy policyWithNamespacedId = createPolicy.getPolicy().toBuilder().setId(namespacedPolicyId).build();
final DittoHeaders dittoHeaders = createPolicy.getDittoHeaders();
return CreatePolicy.of(policyWithNamespacedId, dittoHeaders);
}
}