System.properties access restriction.

[aanton03]

I'm getting access denied ("java.util.PropertyPermission" "*" "read,write") error when using the IO Scheduler.

Its coming from:

RxJava/src/main/java/io/reactivex/internal/schedulers/SchedulerPoolFactory.java

Line 93 in 13772a1

Properties properties = System.getProperties();

static {
        Properties properties = System.getProperties();

        PurgeProperties pp = new PurgeProperties();
        pp.load(properties);

        PURGE_ENABLED = pp.purgeEnable;
        PURGE_PERIOD_SECONDS = pp.purgePeriod;

        start();
    }

All this seems to be from what I could see is that it's trying to get purge options from the system properties.

static final class PurgeProperties {

        boolean purgeEnable;

        int purgePeriod;

        void load(Properties properties) {
            if (properties.containsKey(PURGE_ENABLED_KEY)) {
                purgeEnable = Boolean.parseBoolean(properties.getProperty(PURGE_ENABLED_KEY));
            } else {
                purgeEnable = true;
            }

            if (purgeEnable && properties.containsKey(PURGE_PERIOD_SECONDS_KEY)) {
                try {
                    purgePeriod = Integer.parseInt(properties.getProperty(PURGE_PERIOD_SECONDS_KEY));
                } catch (NumberFormatException ex) {
                    purgePeriod = 1;
                }
            } else {
                purgePeriod = 1;
            }
        }
    }

In my system I can't allow for read/write access to all System properties. Can this be changed to use System.getProperty(PURGE_ENABLED_KEY) or the like as I can allow for access to specific keys.

[akarnokd]

I'll look into it.

[akarnokd]

Fix posted for 3.x and 2.x.