Spring Injection - Thread Protection

Question

public class Test{
private First first;
private Second second;

public void setFirst(First first){
this.first = first;
}
public First getFirst(){
 return first;
}
// same approach for second
}

If I insert an instance through spring injection, is it thread safe? If not, how to make it thread safe? I googled and found conflicting answers, unable to come to any conclusion. Please suggest. Thanks in advance. -RW

Answer 1

If you are talking about what I think you are talking about, then this is an interesting discussion.

Technically, since setFirst()it is getFirst()not synchronized, then it is possible setFirst()to introduce one object into Thread 1 and getFirst()to return another object to Thread 2. Memory The Java model reserves the right to make this "ultimately consistent," as they say.

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Answer 2

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Answer 3

, Test / (a) Spring (b) . get/set:

public synchronized void setFirst(First first){
    this.first = first;
}
public synchronized First getFirst(){
    return first;
}