Reactive extensions for SimpleNoSQL

Overview

RxSimpleNoSQL

Reactive extensions for SimpleNoSQL. Manipulate entities using Observables and Completables.

Examples

Suppose we have the following entity we want to manipulate:

class SampleBean implements Entity {
    private String name;
    private String id;
    private Map<String, String> mapping;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public Map<String, String> getMapping() {
        return mapping;
    }

    public void setMapping(Map<String, String> mapping) {
        this.mapping = mapping;
    }
}

We first start creating a bucket:

Bucket<SampleBean> bucket = new Bucket<>(context, SampleBean.class, "bucketId");

Save

Single

SampleBean entity = new SampleBean();
entity.setId("1");
entity.setName("Colin");
Map<String, Integer> birthday = new HashMap<String, Integer>();
birthday.put("day", 17);
birthday.put("month", 2);
birthday.put("year", 1982);
entity.setMapping(birthday);

bucket.newQuery()
        .save(entity)
        .subscribe();

Multiple

SampleBean entity2 = new SampleBean();
entity2.setId("2");
entity2.setName("Santiago");

SampleBean entity3 = new SampleBean();
entity3.setId("3");
entity3.setName("Xmartlabs");

bucket.newQuery()
        .save(Arrays.asList(entity2, entity3))
        .subscribe();

Retrieve

Single

bucket.newQuery()
        .entityId("entityId")
        .retrieve()
        .subscribe(sampleBean -> System.out.println("Name: %s", sampleBean.getName()));

Multiple

bucket.newQuery()
        .filter(sampleBean -> sampleBean.getName().startsWith("S"))
        .retrieve()
        .subscribe(sampleBean -> System.out.println("Name: %s", sampleBean.getName()));

All

bucket.newQuery()
        .retrieve()
        .subscribe(sampleBean -> System.out.println("Name: %s", sampleBean.getName()));

Delete

Single

bucket.newQuery()
        .entityId("entityId")
        .delete()
        .subscribe();

Multiple

Currently, SimpleNoSQL does not support the usage of filter for the delete operation. There's an issue opened.

Nevertheless, this functionality can be achieved by first retrieving the entities to be deleted and then performing the actual delete operation individually:

Observable<SampleBean> itemsToDelete = bucket.newQuery()
        .filter(sampleBean -> sampleBean.getName().startsWith("S"))
        .retrieve()

Completable deleteCompletable = Completable.concat(
                                  itemsToDelete
                                      .map(item -> bucket.newQuery()
                                                      .entityId(item.getId()))
                                                      .delete());

All

bucket.newQuery()
        .delete()
        .subscribe();

Sorting

[As SimpleNoSQL sorts the results in memory] (https://github.com/Jearil/SimpleNoSQL/blob/master/SimpleNoSQL/src/main/java/com/colintmiller/simplenosql/threading/DataDispatcher.java#L140), you can carry this out the same way with Observable#toSortedList.

Development

As SimpleNoSQL, this project still isn't stable (the API can change at any time). You can use it with Gradle and JitPack:

repositories {
    maven { url "https://jitpack.io" }
}

Then adding the dependency:

implementation 'com.github.xmartlabs:RxSimpleNoSQL:-SNAPSHOT'

RxSimpleNoSQL requires at minimum Java 7 or Android 2.2.

Build

Build Status

To build:

git clone https://github.com/xmartlabs/RxSimpleNoSQL.git
cd RxSimpleNoSQL/
./gradlew build

License

Copyright 2016 Xmartlabs SRL.

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.
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Comments
  • Can't access any method after bucket.newQuery()

    Can't access any method after bucket.newQuery()

    Hi! Thank you for nice lib, but I can't build project because every time I get error "Cannot access xxx method in ""com.xmartlabs.rxsimplenosql.Bucket.BucketQueryBuilder". Example: `class SampleBean implements Entity { private String name; private String id; private Map<String, Integer> mapping;

    public String getName() {
        return name;
    }
    
    public void setName(String name) {
        this.name = name;
    }
    
    @Override
    public String getId() {
        return id;
    }
    
    public void setId(String id) {
        this.id = id;
    }
    
    public Map<String, Integer> getMapping() {
        return mapping;
    }
    
    public void setMapping(Map<String, Integer> mapping) {
        this.mapping = mapping;
    }
    
    class sss{
        Bucket<SampleBean> bucket;
        public sss(Context context){
            Bucket<SampleBean> bucket = new Bucket<>(context, SampleBean.class, "bucketId");
        }
    
        public void single(){
            SampleBean entity = new SampleBean();
            entity.setId("1");
            entity.setName("Colin");
            Map<String, Integer> birthday = new HashMap<String, Integer>();
            birthday.put("day", 17);
            birthday.put("month", 2);
            birthday.put("year", 1982);
            entity.setMapping(birthday);
    
            bucket.newQuery()
                    .save(entity)
                    .subscribe();
        }
    }
    

    }` Have you any ideas what is the problem?

    opened by svarogSLASHc 1
  • Deleting multiple items not possible as described in the readme

    Deleting multiple items not possible as described in the readme

    Trying to delete multiple items from a bucket as described like this

    bucket.newQuery()
            .filter(sampleBean -> sampleBean.getName().startsWith("S"))
            .delete()
            .subscribe();
    

    will and cannot work, as the SimpleNoSQL documentation for the QueryBuilder#filter method already states that it will only be used when retrieving items from a bucket. Also if you look at the DataDispatcher class in the SimpleNoSQL project, you will see that in fact, it really just deletes either a single item or a whole bucket.

    This is my workaround (deltedItems is a list of items I want to delete, obviously):

     Completable completable = Completable.concat(
                                    Observable.from(deletedItems)
                                        .map(item -> localBucket
                                                        .newQuery()
                                                        .entityId(item.getId())
                                                        .delete()));
    return completable.andThen(Observable.just(true));
    
    opened by AlexGrafl 0
  • Use the cancel operation if necessary

    Use the cancel operation if necessary

    Something like the RxJava adapter for Retrofit: https://github.com/square/retrofit/blob/master/retrofit-adapters/rxjava/src/main/java/retrofit2/adapter/rxjava/RxJavaCallAdapterFactory.java#L139

    opened by bryant1410 0
  • Filter items in a reactive way

    Filter items in a reactive way

    Right now, the filter is not applied to an Observable. Maybe a better approach is that entities are directly got as Observables, and then a filter can be applied. So this should return an Observable instead: https://github.com/Jearil/SimpleNoSQL/blob/master/SimpleNoSQL/src/main/java/com/colintmiller/simplenosql/threading/DataDispatcher.java#L140

    opened by bryant1410 0
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