CODEWITHSUNDEEP
androidrealm
1911z
1911z

Reputation: 1093

Realm, multiple instances from the same configuration

In order to handle all the realm transitions, I've created an helper 'manager' class, that has the following property:

Realm realm;

Every method has a function that gets the realm instance from a configuration.

RealmConfiguration realmConfig = new RealmConfiguration.Builder(context).build();
realm = Realm.getInstance(realmConfig);

Where the the Realm Builder:

public Builder(Context context) {
    if (context == null) {
        throw new IllegalArgumentException("A non-null Context must be provided");
    }
    initializeBuilder(context.getFilesDir());
}

In this way there are concurrency problems like 'this Realm instance has already been closed, making it unusable'. I've written a test which writes/reads large amount of data but I am not able to reproduce the above said error, that occurs quite rarely.

What prevents me from removing the realm property and create a local variable per method, is:

Upvotes: 0

Views: 754

Answers (1)

Tim
Tim

Reputation: 43314

can a configuration be used to spawn multiple realm instances?

Yes.

Christian Melchior also does it himself here

if allowed, is this the best approach?

That is a difficult question. "Best" depends on the situation and context. If you are only using 1 RealmConfiguration (you do not mention that you use multiple, so I assume you use 1), I suggest you define that in an Application class (as do the docs) and use Realm.getDefaultInstance() to reference it.

Upvotes: 1

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