I am implementing a custom entity, and so far I had to add synched entity data to it. For example:

private static final EntityDataAccessor<Boolean> DATA_IS_SOMETHING = SynchedEntityData.defineId(CustomEntity.class, EntityDataSerializers.BOOLEAN);

@Override
protected void defineSynchedData() {
    super.defineSynchedData();
    this.entityData.define(DATA_IS_SOMETHING, false);
}

Under certain conditions, the DATA_IS_SOMETHING of my entity will change to true. To my dismay though, when the player dies and then respawns, that entity's DATA_IS_SOMETHING resets back to false. Is this normal behavior? If so, then should I use capabilities instead? FYI I need the data to be synced between the server and client. 

Edited November 2, 20231 yr by LeeCrafts

bump

Did you saved the value of DATA_IS_SOMETHING to disk when the Entity is unloaded in addAdditionalSaveData and load it in readAdditionalSaveData?

Wow, I didn't know that I had to do that, thank you!

This is my code, if any of you are curious:

// getter and setter methods that i already had
public boolean isSomething() {
    return this.entityData.get(DATA_IS_SOMETHING);
}

public void setSomething(boolean isSomething) {
    this.entityData.set(DATA_IS_SOMETHING, isSomething);
}

...

// what solved my issue
@Override
public void addAdditionalSaveData(@NotNull CompoundTag pCompound) {
    super.addAdditionalSaveData(pCompound);
    pCompound.putBoolean("IsSomething", this.isSomething());
}

@Override
public void readAdditionalSaveData(@NotNull CompoundTag pCompound) {
    super.readAdditionalSaveData(pCompound);
    this.setSomething(pCompound.getBoolean("IsSomething"));
}