Wrap DateFormat in a thread local instance.
From the docs:
```
Date formats are not synchronized. It is recommended to create
separate format instances for each thread. If multiple threads access
a format concurrently, it must be synchronized externally.
```
This is causing us to send timestamps, such as:
`2016-12-23T00:0017:40+1300`, `2017-1-05T16:44:34+0800`
MODIFY
analytics/src/main/java/com/segment/analytics/internal/Utils.java
analytics/src/main/java/com/segment/analytics/internal/Utils.java
package com.segment.analytics.internal;
-import android.annotation.SuppressLint;
import android.content.Context;
import android.content.SharedPreferences;
import android.net.ConnectivityManager;
@@ -79,8 +78,12 @@ public final class Utils {
public static final int DEFAULT_FLUSH_INTERVAL = 30 * 1000; // 30s
public static final int DEFAULT_FLUSH_QUEUE_SIZE = 20;
public static final boolean DEFAULT_COLLECT_DEVICE_ID = true;
- @SuppressLint("SimpleDateFormat") private static final DateFormat ISO_8601_DATE_FORMAT =
- new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.US);
+ private static final ThreadLocal<DateFormat> ISO_8601_DATE_FORMAT =
+ new ThreadLocal<DateFormat>() {
+ @Override protected DateFormat initialValue() {
+ return new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.US);
+ }
+ };
/** Creates a mutable HashSet instance containing the given elements in unspecified order */
public static <T> Set<T> newSet(T... values) {
@@ -91,12 +94,12 @@ public final class Utils {
/** Returns the date as a string formatted with {@link #ISO_8601_DATE_FORMAT}. */
public static String toISO8601Date(Date date) {
- return ISO_8601_DATE_FORMAT.format(date);
+ return ISO_8601_DATE_FORMAT.get().format(date);
}
/** Returns the string as a date parsed with {@link #ISO_8601_DATE_FORMAT}. */
public static Date toISO8601Date(String date) throws ParseException {
- return ISO_8601_DATE_FORMAT.parse(date);
+ return ISO_8601_DATE_FORMAT.get().parse(date);
}
//TODO: Migrate other coercion methods.

Wrap DateFormat in a thread local instance.

From the docs:

https://developer.android.com/reference/java/text/SimpleDateFormat.html

```
Date formats are not synchronized. It is recommended to create
separate format instances for each thread. If multiple threads access
a format concurrently, it must be synchronized externally.
```

This is causing us to send timestamps, such as:
`2016-12-23T00:0017:40+1300`, `2017-1-05T16:44:34+0800`