Java 如何在模式重叠时找到发生点

上下文： 这是一个日志分析的事情。我正在创建一个

regex

程序，以查找从客户端发送到服务器的某些请求。我有包含这些请求和其他日志的客户端日志文件

问题： 将请求消息发送到服务器时，客户端应有2条日志语句，如：

sending..
message_type

当发现上述语句或模式时，我们可以说已经发送了一个请求。它是组合模式。嗯

我们希望日志文件内容如下所示

sending..
message_type
...//other text
sending..
message_type
...//other text
sending..
message_type

从上面的日志中，我们可以说客户端已经发送了3条消息。但在实际的日志文件中，模式重叠，如下所示（不是针对所有消息，而是针对某些消息）：

仍然有3个请求（我对要理解的消息进行了编号）。但模式是重叠的，即在完全记录第一条消息之前，记录第二条消息。 以上解释仅供理解。以下是原始日志的一部分：

原始日志

Send message to server:
Created post notification log dir
Created post notification log dir
Created post notification log dir
Send message to server:
Created post notification log dir
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><request xaction_guid="new xaction guid" type="createsession"/></message>
INFO [a] - Server Response: <?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><response xaction_guid="new xaction guid" type="ok"></params></response></message>
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><request xaction_guid="new xaction guid" type="createsession"/></message>
INFO [a] - Server Response: <?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><response xaction_guid="new xaction guid" type="ok"></response></message>

预期产出

INPUT:
Send message to server:
Created post notification log dir
Created post notification log dir
Created post notification log dir
Send message to server:
Created post notification log dir
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><request xaction_guid="new xaction guid" type="createsession"/></message>
Store in DB :
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><request xaction_guid="new xaction guid" type="createsession"/></message>
INFO [a] - Server Response: <?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><response xaction_guid="new xaction guid" type="ok"></params></response></message>
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><request xaction_guid="new xaction guid" type="createsession"/></message>
INFO [a] - Server Response: <?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><response xaction_guid="new xaction guid" type="ok"></response></message>

COUNT:
              to server:  2
         create_session:  2

从日志中可以清楚地看出，发送了2条消息。因此，输出将是：

 Send message to server:  2
         create_session:  2

您可以看到我在代码中尝试的模式。有人能提出一种模式来获得期望的结果吗

注意：可以简单地说，为什么不单独使用count

向服务器发送消息。因为在日志中有许多类型的消息，如
登录、closesession
等。所有这些消息的第一部分都是
向服务器发送消息
。此外，它们还单独记录了用于其他目的的消息类型，因此我们无法对任何部分进行中继（这意味着只有我们可以中继的组合）

查找从客户端发送到服务器的某些请求的发生情况

这里您可以忽略的“其他方式”，它将像
存储在DB:
中，而不是
将消息发送到服务器
和xml消息

我会提出一个新的策略：

仅使用1个正则表达式匹配所有可选项，只解析日志一次（提高长文件的性能）
独立匹配
type=\“createsession\”
xmls
同样匹配
存储在DB:
xmls中，但忽略它们（不要增加计数器）
我们可以使用以下表达式来匹配发送到服务器的消息数

^(?<toserver>Send message to server:)


后来被称为
regexMatcher.group（“消息”）
我们将使用一个独立的计数器

那么，我们如何忽略
存储在DB:
xmls中？我们可以在不创建捕获的情况下匹配它们

^Store in DB ?:\r?\n(?:.*\n)*?<\? *xml\b.*



代码

static final String create_session = "^(?:Store in DB ?:\\r?\\n(?:.*\\n)*?<\\? *xml\\b.*|(?<toserver>Send message to server:)|(?<message><\\? *xml\\b.{10,500} type *= *\\\"createsession\\\"))";

public static void main (String[] args) throws java.lang.Exception
{
    //for testing purposes
    final String text = "Send message to server:\nCreated post notification log dir\nCreated post notification log dir\nCreated post notification log dir\nSend message to server:\nCreated post notification log dir\n<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><message schema_version=\"3644767c-2632-411a-9416-44f8a7dee08e\"><request xaction_guid=\"new xaction guid\" type=\"createsession\"/></message>\nStore in DB :\n<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><message schema_version=\"3644767c-2632-411a-9416-44f8a7dee08e\"><request xaction_guid=\"new xaction guid\" type=\"createsession\"/></message>\nINFO [a] - Server Response: <?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><message schema_version=\"3644767c-2632-411a-9416-44f8a7dee08e\"><response xaction_guid=\"new xaction guid\" type=\"ok\"></params></response></message>\n<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><message schema_version=\"3644767c-2632-411a-9416-44f8a7dee08e\"><request xaction_guid=\"new xaction guid\" type=\"createsession\"/></message>\nINFO [a] - Server Response: <?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><message schema_version=\"3644767c-2632-411a-9416-44f8a7dee08e\"><response xaction_guid=\"new xaction guid\" type=\"ok\"></response></message>";
    System.out.println("INPUT:\n" + text + "\n\nCOUNT:");
    StringBuilder b = new StringBuilder();
    b.append(text);

    findMatch(b,create_session,"create_session");
}

private static int findMatch(StringBuilder b,String pattern, String type) {
    int count =0;  // counter for "Send message to server:"
    int countType=0; // counter for "type=\"createsession\""
    Pattern regex = Pattern.compile(pattern,Pattern.MULTILINE);
    Matcher regexMatcher = regex.matcher(b.toString());
    while (regexMatcher.find()) {
        if (regexMatcher.group("toserver") != null) {
            count++;
        } else if (regexMatcher.group("message") != null) {
            countType++;
        } else {
            // Ignoring "Store in DB :\n<?xml...."
        }
    } 
    System.out.printf("%25s%2d\n%25s%2d\n", "to server: ", count, type+": ", countType);
    return countType;
}

static final String create\u session=“^（？：存储在数据库中？：\\r？\\n（？：.\\n）*？那么为什么不单独计算
type=\“createsession\”
？…是什么阻止它记录
发送（1）
+
发送（2）
+
消息（1）
+
消息（2）
？为什么\“
xmls与
Send message to server
以及一些其他方式（如存储在
db
中）一起记录。因此，我们不能简单地依赖于此。那么，您如何知道是否存在
类型=\“createsession\”的“其他方式”
在
将消息发送到服务器
和要匹配的xml之间？能否显示一个要忽略的xml示例？“其他方式”您可以忽略这一点，它将像
存储在DB:
中，而不是
向服务器发送消息
和xml消息。我只想知道如何处理这种重叠的情况谢谢@Mariano，我喜欢您指定的组和策略。我想我可以从这种方法开始
^(?<toserver>Send message to server:)

^(?<message><\? *xml\b.{10,500} type *= *\"createsession\")

^Store in DB ?:\r?\n(?:.*\n)*?<\? *xml\b.*

^(?:Store in DB ?:\r?\n(?:.*\n)*?<\? *xml\b.*|(?<toserver>Send message to server:)|(?<message><\? *xml\b.{10,500} type *= *\"createsession\"))

static final String create_session = "^(?:Store in DB ?:\\r?\\n(?:.*\\n)*?<\\? *xml\\b.*|(?<toserver>Send message to server:)|(?<message><\\? *xml\\b.{10,500} type *= *\\\"createsession\\\"))";

public static void main (String[] args) throws java.lang.Exception
{
    //for testing purposes
    final String text = "Send message to server:\nCreated post notification log dir\nCreated post notification log dir\nCreated post notification log dir\nSend message to server:\nCreated post notification log dir\n<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><message schema_version=\"3644767c-2632-411a-9416-44f8a7dee08e\"><request xaction_guid=\"new xaction guid\" type=\"createsession\"/></message>\nStore in DB :\n<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><message schema_version=\"3644767c-2632-411a-9416-44f8a7dee08e\"><request xaction_guid=\"new xaction guid\" type=\"createsession\"/></message>\nINFO [a] - Server Response: <?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><message schema_version=\"3644767c-2632-411a-9416-44f8a7dee08e\"><response xaction_guid=\"new xaction guid\" type=\"ok\"></params></response></message>\n<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><message schema_version=\"3644767c-2632-411a-9416-44f8a7dee08e\"><request xaction_guid=\"new xaction guid\" type=\"createsession\"/></message>\nINFO [a] - Server Response: <?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><message schema_version=\"3644767c-2632-411a-9416-44f8a7dee08e\"><response xaction_guid=\"new xaction guid\" type=\"ok\"></response></message>";
    System.out.println("INPUT:\n" + text + "\n\nCOUNT:");
    StringBuilder b = new StringBuilder();
    b.append(text);

    findMatch(b,create_session,"create_session");
}

private static int findMatch(StringBuilder b,String pattern, String type) {
    int count =0;  // counter for "Send message to server:"
    int countType=0; // counter for "type=\"createsession\""
    Pattern regex = Pattern.compile(pattern,Pattern.MULTILINE);
    Matcher regexMatcher = regex.matcher(b.toString());
    while (regexMatcher.find()) {
        if (regexMatcher.group("toserver") != null) {
            count++;
        } else if (regexMatcher.group("message") != null) {
            countType++;
        } else {
            // Ignoring "Store in DB :\n<?xml...."
        }
    } 
    System.out.printf("%25s%2d\n%25s%2d\n", "to server: ", count, type+": ", countType);
    return countType;
}

INPUT:
Send message to server:
Created post notification log dir
Created post notification log dir
Created post notification log dir
Send message to server:
Created post notification log dir
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><request xaction_guid="new xaction guid" type="createsession"/></message>
Store in DB :
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><request xaction_guid="new xaction guid" type="createsession"/></message>
INFO [a] - Server Response: <?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><response xaction_guid="new xaction guid" type="ok"></params></response></message>
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><request xaction_guid="new xaction guid" type="createsession"/></message>
INFO [a] - Server Response: <?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><response xaction_guid="new xaction guid" type="ok"></response></message>

COUNT:
              to server:  2
         create_session:  2